Noise Monitoring Report

Stansted Airport, 109 Hadham

Noise Monitoring Report Report 17/0484/R2

Stansted Airport, 109 Hadham

Noise Monitoring Report Report 17/0484/R2

Manchester Airport Group Olympic House Manchester Airport Manchester M90 1QX

Revision

Description

Date

Prepared

Approved

0

Draft

19 October 2017

Johnny Berrill

Vernon Cole

1

1 Issue

27 October 2017

Johnny Berrill

Vernon Cole

st

This report and associated surveys have been prepared and undertaken for the private and confidential use of our client only. If any third party whatsoever comes into possession of this report, they rely on it at their own risk and Cole Jarman Limited accepts no duty or responsibility (including in negligence) to any such third party.

Cole Jarman Limited Reg. in England and Wales No. 7102436 Head Office +44 (0)1932 829007 John Cree House, 24B High Street, Addlestone, Surrey, KT15 1TN

[email protected] www.colejarman.com Manchester Office +44 (0)161 2093644 Peter House, 1 Oxford Street, Manchester, M1 5AN

Noise Monitoring Report

Table of Contents Executive Summary

4

1

Introduction

5

2

Site Description

5

3

Survey Methodology

5

4

Weather and Operating Conditions

6

5

Measurement Results

8

6

Measurement Discussion

6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9

General Comments N70 and N60 N60 and N70 Variations Noise Events by Aircraft Type Noise Level Frequency Distribution Aircraft Maximum Noise Levels Noise Events Throughout the Day Aircraft Location Weather and Runway Use

7

Conclusions

Page 2 Table of Contents

10 10 11 12 15 16 17 18 19 21

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Noise Monitoring Report

Attachments 17/0484/F1 Site Plan showing noise and weather monitoring locations 17/0484/L2 Time history of measured LAeq levels, and calculated aircraft and community LAeq levels at Hadham 17/0484/SCH2 Schedule of measured indices during monitoring period at Hadham 17/0484/W03, W10, W99 Weather records and runway use during monitoring period Glossary of Acoustic Terms Appendix A Gate Penetration Information

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End of Section

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Noise Monitoring Report Executive Summary An extended noise survey has been undertaken during Summer 2017 at two locations to the north and west of the Stansted Airport boundary, in the areas of Debden and Hadham. This report relates to the monitoring undertaken at Hadham. Analysis and compilation of the noise survey data has been undertaken by Cole Jarman. Where noise levels at the monitoring position were recorded as being above a set trigger level these were compared to Stansted Airport aircraft movements. If the elevated noise level correlated with an aircraft movement above the monitoring position the movement data and associated noise level were logged. During the period, aircraft operated on south-westerly (Runway 22) movements for the majority of the time. North-easterly (Runway 04) operations took place on a lesser number of days. This reflects the prevailing weather conditions at Stansted. Analysis of the survey data indicates that Runway 22 departures result in the majority of correlated aircraft movements above this monitoring position, at a greater ratio than the operational split. A small number of correlated Runway 04 arrivals and a negligible number of Runway 22 arrivals are also noted. Therefore, departures on Runway 22 control the noise impact of aircraft operations upon this location. The measurements indicate that at Hadham the prevailing daytime noise levels are 52 dB LAeq,16h on average and the analysis indicates this is only marginally influenced by aircraft movements. This level sits well below the WHO guideline limit in external amenity areas of 55 dB LAeq,16h. Average daily N60 and N70 events which have been correlated to aircraft movements are seen to sit below a level where impact would typically be considered. Additional visual and numerical representations of LAmax levels during correlated aircraft flyovers are provided for reference.

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Noise Monitoring Report 1 Introduction 1.1 Noise monitoring has been carried out during Summer 2017 at two locations to the north and west of the Stansted Airport boundary, in the areas of Debden and Hadham. 1.2 The monitoring analysis is split into two reports, one for each measurement position, with this report focusing on the methodology employed and results recorded at Hadham, Located to the west of the airport. 1.3 The purpose of the monitoring is to determine typical levels and sources of ambient noise prevailing at the present time across an extended period. The aim is then to examine the data having specific regard to noise generated by operations at Stansted Airport at each location.

2 Site Description 2.1 The measurement position is in the grounds of a dwelling at Cradle End, Hadham. The general location is shown on attached figure 17/0484/F1. 2.2 The area would be generally described as rural in nature with individual dwelling settlements. 2.3 At Hadham the monitor is set up at a location with suitable power supplied via the residence. Intermittent road traffic on the A120 and other local roads dominates the noise climate when present, and air traffic can also be heard when local noise levels are reduced. There were a small number of local and meteorological noise events during the monitoring period some of which were identifiable and are highlighted within this report. 2.4 This report concerns itself with noise associated with Stansted Airport which is primarily apparent at this location when operating on Runway 22 (south westerly) for departing aircraft. There are also recorded events for aircraft arriving to both runways.

3 Survey Methodology 3.1 The noise monitoring to which this report relates commenced on Monday 17th July 2017 and continued until Friday 22nd September 2017 covering a total of 67 complete days. 3.2 Measurements were made at the location shown on attached figure 17/0484/F1 and described below. Monitor positions are given the reference number set by Stansted Operations for ease of reference: 

[P109] Residential Grounds to at Cradle End, Hadham

3.3 All measurements were made at approximately 4 metres above ground level, in free field conditions.

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Noise Monitoring Report 3.4 The measurements were predominantly unattended. However, audio recording was enabled to allow a more detailed and subjective analysis of relevant periods if required. In addition, a trigger was set to allow the correlation of aircraft movements with the measured noise when it exceeded a certain level. The set level in the case of this monitoring was 55 dB(A). 3.5 Measurements have been made of the LAeq and LAmax,S, indices (see attached Glossary of Acoustic Terms for explanation of noise units used). 3.6 Noise measurements were made using the following equipment:

Item Sound Level Analyser Acoustic Calibrator T1

Manufacturer Bruel and Kjaer Bruel and Kjaer

Type 3639 – A (portable) Auto calibration

Equipment used during noise surveys

3.7 The sound level analysers and their containers are designed specifically for this type of long term external noise monitoring. Each analyser is located in a locked, waterproof case and each microphone is fitted with a weather proof windshield. 3.8 The equipment auto-calibrates on a continual regular basis while in-situ and is manually calibrated annually.

4 Weather and Operating Conditions 4.1 Weather conditions at the commencement of the survey on Monday 17th July were observed to be mild and dry, with no precipitation. Some wind was present, from a north westerly direction. 4.2 The weather conditions during the entirety of the survey are displayed on attached figures 17/0484/W03, W10, W99. The departure runway which was used by any operations triggering the pre-set level at the noise monitoring locations is also shown on these figures. The locations of the weather monitoring equipment are shown on the attached site plan 17/0484/F1. 4.3 The data collected by the Noise Monitoring Terminal is imported directly into the airport’s noise and track keeping system, ANOMS1. This system also receives a radar feed directly from Air Traffic Control (for Stansted Operations only). All the data is processed including radar, noise, METAR and flight data. Operations that trigger a noise event are then correlated to individual aircraft movements, enabling the system to be interrogated for directly correlated aircraft noise events and background noise events. In addition to the correlated data, the

1

Airport Noise and Operations Monitoring System

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Noise Monitoring Report ANOMS system was setup to also capture the height and lateral tracks of aircraft by means of a ‘Gate’. 4.4 Aircraft movements were established by use of this virtual gate above the monitoring position. Aircraft movements which passed through this gate from ground level up to 10,000ft above the monitoring position with a horizontal deviation of 3,000m to both sides of the position were recorded and correlated with any noise events which exceeded a trigger level of 55 dB(A). Further information on the gate is provided in Appendix A. 4.5 It can be seen from figures 17/0484/W03, W10, W99 that average conditions varied over the course of the measurement period, with changes in wind direction leading to changes in the operational mode for aircraft departures and arrivals. Over the course of the measurements, analysis of data from the gate indicates that the majority (94%) of identified movements above the monitoring position were due to movements (primarily departures with a very small number of arrivals) on Runway 22 (south-westerly direction). 4.5% of noted movements above the monitoring position were due to arrival operations on Runway 04 (south-westerly direction). Other movements noted were due to overflights or helicopters. 4.6 Aircraft movements were also established for all airport operations during the monitoring period. For comparison with the above noted movements, the table T2 below sets out details of the runway use for the airport over the monitoring period obtained directly from NATS 2. It can be seen that the percentage of movements above the monitor indicated by the gate analysis does not correlate well with the total runway use during the monitoring period indicated by the NATS data. Operations on Runway 22 are seen to result in the majority of flyovers above this monitoring position, to a greater extent than the airport operations on Runway 22.

July (16 Days) August (whole month) September (21 days) Total (85 days) T2

NATS Log Movements Runway 04 Runway 22 2,505 7,339 2,498 15,626 2,666 10,864 7,669 33,829

Percentage Movements Runway 04 Runway 22 25% 75% 14% 86% 20% 80% 18% 82%

Runway Use Summary

4.7 In general, weather conditions were conducive to accurate measurement of typical noise conditions, with data recorded for both operating directions.

2

National Air Traffic Services

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Noise Monitoring Report 5 Measurement Results 5.1 Results of the LAeq, noise measurements at position P109 are presented in the attached figures: 5.2 17/0484/L2 sets out a comparison of the measured hourly LAeq,1h levels with LAeq,1h levels attributable solely to aircraft movements exceeding the pre-set trigger level as well as ‘community’ levels which are derived from a logarithmic subtraction of the aircraft level from the total measured level. It is notable that these comparisons include the effect of noise sources which may have exceeded the trigger level during an airplane pass by, and so are considered pessimistic. 5.3 In addition to the above, noise indices relevant to various environmental and aircraft noise assessments have been calculated. The indices are set out in the attached 17/0484/SCH2 and are described below. 

LAeq,16h is the standard A-weighted continuous sound pressure level used to represent day time noise levels covering the period 0700h-2300h, as referenced in World Health Organisation guidance3 and BS8233:20144



Lday is the descriptor used under the European Environmental Noise Directive 2002 for the standard A-weighted continuous sound pressure level average across day time noise levels covering the period 0700h-1900h



Levening is the descriptor used under the European Environmental Noise Directive 2002 for the standard A-weighted continuous sound pressure level average across evening time noise levels covering the period 1900h-2300h



Lnight is the descriptor used under the European Environmental Noise Directive 2002 for the standard A-weighted continuous sound pressure level average across night time noise levels covering the period 2300h-0700h. It is equivalent to the LAeq,8h night time noise level referred to in WHO guidance and BS8233:2014.



Lden is a logarithmic composite of the Lday Levening, and Lnight levels, being corrected for time and with the Levening and Lnight levels subject to a 5 dB and 10 dB penalty respectively.

5.4 The following table presents a summary of the derived noise indices at the Hadham measurement position, averaged over the duration of the survey. 5.5 Figures in the table are given as an average across all days, including those where there were no correlated aircraft movements. It can be seen that the average levels due to aircraft alone are low which is reflective of limited impact upon the noise climate at this location.

3 4

WHO Guidelines for Community Noise, WHO headquarters 1999 BS8233:2014 Guidance on sound insulation and noise reduction for buildings

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Noise Monitoring Report

LAeq,16h

Average Levels as Measured (dB) 52

Average Levels with Average Levels due to Aircraft Removed (dB) Aircraft Alone (dB) 49 48

Lday

52

50

48

Levening

50

47

46

Lnight

46

44

43

Lden

55

53

52

Level

T3

Noise Indices Summary

5.6 In addition to the above indices the N70 (number of noise events due to aircraft exceeding 70 dB) and N60 levels were established. The N70 was calculated by summing the number of aircraft incidences which caused the LAmax,S level between 0700h and 2300h to exceed 70dB. A similar exercise was carried out for a 60 dB limit between 2300h and 0700h to establish the N60. The following table summarises these results.

Total July (15 days) August (whole month) September (21 days) T4

N70 (0700h-2300h) Total Daily Average 377 5.5 (6.6) Daily Average Daily Max 6 (8) 17 5 (6) 17 6 (7) 20

N60 (2300h-0700h) Total Daily Average 495 7.3 (8.3) Nightly Average Nightly Max 6 (9) 14 8 (9) 16 7 (7) 11

N70 and N60 Summary – exclusive averages given in brackets

5.7 The N60 and N70 numbers are provides as a period max, the maximum daily or nightly movements in any one period during each month, to represent the worst case movements. Two averages are then provided. The daily or nightly average as presented are true averages over the entire period to provide a representation of the averaged impact at the location. An exclusive average is also provided in italicised brackets, giving an average of N incidences taking into consideration only days and nights where at least one N incident was recorded. 5.8 As part of the analysis audio recordings of the highest measured LAmax levels were examined in order to ensure these correlated with aircraft movements. A number of events were identified which ascribed an LAmax level to a Stansted airplane flyover where the controlling source was clearly not this aircraft. These events are noted below. 5.9 It can be seen that a number of events were due to helicopter movements, with one due to a light aircraft. It is not clear if these are associated with Stansted Airport, although it is likely as

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Noise Monitoring Report this location is near a helicopter route used by Stansted Airport. LAmax levels are provided for each of these identified movements for reference as it may be considered relevant to include these movements in the analysis of Stansted movements.

Date and Time 01 August, 15:37 03 August, 09:07 05 August, 11:31 10 August, 07:27 17 August, 15:13 18 August, 09:55 T5

Noise Source Helicopter (74.4) Helicopter (73.6) Helicopter (73.4) Helicopter (74.6) Helicopter (76.3) Helicopter (80.9)

Date and Time 18 August, 10:07 19 August, 17:34 21 August, 13:32 25 August, 12:13 09 September, 16:04 10 September, 17:55

Noise Source Helicopter (74.9) Helicopter (75.4) Helicopter (74.3) Motorbike Local Road Traffic Light Aircraft (77.7)

Noise Events – LAmax,S level provided in brackets for helicopter and light aircraft movements

5.10 These occurrences were removed from the above N70 and N60 analysis, and from the LAmax analysis presented below. However, the levels have not been removed from the above LAeq and daily noise index analysis as this calculation was undertaken automatically by the sound monitoring software. The analysis of the impact of aircraft noise upon the baseline ambient noise levels can therefore be considered pessimistic. 5.11 Additional correlated events are also likely to have occurred which may have been controlled by weather or local sources. Audio analysis was only undertaken for noise events with an LAmax,S level of 73 dB and greater. It is expected, therefore, that these numbers are pessimistic due to the inclusion of noise levels which may not be due to aircraft movements as noted above. 5.12 It is worth noting that with this pessimistic analysis the average daily N70 and N60 incidences are considered to be low; maps presenting such incidences in the vicinity of airports rarely indicate contours representing N values below 10, and where the analysis has been used for UK airports, ’25 events per day’ is typically the minimum contour.

6 Measurement Discussion 6.1 General Comments 6.1.1 The attached time history graph 17/0484/L2 sets out the hourly noise levels, with data processed in a manner that permits analysis of the influence on the prevailing ambient noise levels of aircraft operations. 6.1.2 It is worth noting that there are periods of elevated noise levels which do not correlate with aircraft movements, as per the events identified above. 6.1.3 Aside from the events noted above in Section 5.7, noise events were not removed from the analysis as a general principle as it was not possible to confirm that the noise level measured

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Noise Monitoring Report was not due to an overflying aircraft. For example, where a flyover correlated with a local noise event which controlled the measured level, this event level, which may have been due to the local noise event, is attributed to the flyover. The analysis is therefore considered pessimistic, but the approach is more robust than an analysis in which noise levels associated with such events were totally removed from the flyover data. 6.1.4 It can be seen from Table T3 above that on average there is an approximate 2-3dB difference between community noise indices with and without aircraft noise indicating that noise due to aircraft movements and noise from all other sources contribute approximately equally to the overall noise climate. 6.2 N70 and N60 6.2.1 The following graphs set out the daily daytime N70 and night time N60 results from the analysis:

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Noise Monitoring Report

6.2.2 It is worth noting that while the elevated levels have been correlated with aircraft movements timing wise this does not absolutely confirm that the noise levels have been caused by aircraft movements. 6.2.3 As noted above, a number of occurrences have been correlated with non-aircraft noise events. While some were removed from analysis as it was possibly to clearly identify that an alternative source caused the elevated level, all other events have remained in the analysis as it cannot be definitively stated that the flyover at the same time did not result in the elevated level. Therefore, for robustness, these levels remain included in the analysed data. 6.3 N60 and N70 Variations 6.3.1 In order to examine the aircraft flyovers in more detail the night time 60 dB LAmax and day time 70 dB LAmax levels were analysed in a manner that deviates from the standard N60 and N70 analysis. Firstly, the exceedances of 60 dB LAmax was analysed during the night time ‘shoulder periods’ of 23h00 to 23h030 and 06h00 to 07h00. This index is referred to as N60’ in the following figures.

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Noise Monitoring Report

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Noise Monitoring Report 6.3.2 It can be seen within the above figures, and from comparison of the N60’ figures with the N60 figures in Section 6.2, that the majority of night time exceedances of 60 dB LAmax occur between 06h00 and 07h00. 6.3.3 A second analysis has been undertaken with reference to the existing permitted flying hours at Stansted airport, with operations being allowed as standard between 06h00 and 23h30 and operations outside of these hours being subject to a night time quota. 6.3.4 The number of exceedances of 70 dB LAmax during the standard hours are referred to as N70* in the figures below while the number of exceedances of 60 dB LAmax during the night time hours of 23h30 to 06h00 are referred to as N60*. 6.3.5 It must be emphasised that while the analyses of the number of flights above 70dB and 60dB during non-standard periods provides useful information on the distribution of noise events throughout a full 24 hour day, the numerical results cannot easily be interpreted with regard to the community response. It is for this reason that current guidance from the CAA, whether established as in CAP 7255 or draft as in CAP 15206, does not recommend the inclusion of such analyses when assessing the noise effects of airspace changes at UK airports.

5 6

CAA Guidance on the Application of the Airspace Change Process, CAP 725: March 2016 CAP 1520: CAA Draft airspace design guidance, draft for consultation: March 2017

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Noise Monitoring Report

6.4 Noise Events by Aircraft Type 6.4.1 In the following graph it can be seen that aircraft type 73H (Boeing 737-800) undertakes the overwhelming majority of flights at this airport that result in noise events at this site. Type 319 (Airbus 319) is the next most common aircraft.

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Noise Monitoring Report 6.4.2 Over the survey period, 24 aircraft types were noted to appear once each. For ease of reference, these movements are grouped into a single bin titled ‘SINGLE’ in the graph above and the following graph. 6.4.3 The graph below sets out the average and highest LAmax level measured during flyovers attributed to the various aircraft. There is, inevitably, variation in the maximum levels generated with the 73H (Boeing 737-800) leading to the highest LAmax flyover level at 76.7 dB, and a number of smaller aircraft generating LAmax flyover levels in the order of 62-67 dB.

6.5 Noise Level Frequency Distribution 6.5.1 The graph below sets out the frequency distribution of LAmax levels measured during correlated flyovers at this location. Analysis of the distribution shows that 84% of flyovers fall in the 63-70 dB LAmax range.

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Noise Monitoring Report

6.6 Aircraft Maximum Noise Levels 6.6.1 The following graphs show the highest and average measured LAmax levels at P198 during the monitoring period. Breaks in the data are due to there being no correlated aircraft flyovers with noise events exceeding 55 dB(A). 6.6.2 The range of levels is consistent with what is shown in the graph in paragraph 6.3.2 above, with 13th September having a highest LAmax flyover level of 76.7 dB while 17th July has a highest LAmax flyover level of just over 58 dB.

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Noise Monitoring Report

6.7 Noise Events Throughout the Day 6.7.1 The following graphs provide a breakdown of the aircraft events measured during the 77-day monitoring period in terms of number of aircraft and in terms of highest and average LAmax level measured during correlated events. It can be seen that 07:00-09:00 and 21:00-22:00 are the busiest periods, while the average LAmax,S level remains quite constant at approximately 64-66 dB LAmax,S.

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Noise Monitoring Report

6.8 Aircraft Location 6.8.1 At this location two gates were used, one focusing on the centre line for Runway 22 departures and one on the centre line for Runway 04 arrivals passing over this location. Further information on the gate is set out in the attached Appendix A.

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Noise Monitoring Report 6.8.2 The following graphs set out the variation in measured LAmax level with aircraft height and deviation from the gate centre point during flyovers. The data is based on the variation from both the Runway 22 departures gate and the Runway 04 gate combined.

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Noise Monitoring Report 6.8.3 It can be seen from the above that there is not a strong correlation between aircraft height or deviation from gate centre and measured LAmax level. It can also be seen that the majority of flyovers close to the line of the gate. Gate position and geometry is shown in the attached Appendix A. 6.8.4 The following figure sets out an analysis undertaken by the Stansted Flight Performance team of the variation in average LAmax level with deviation from monitoring position for the Runway 22 departure route, this being the most common route with events exceeding the set trigger level. The analysis is undertaken on departure aircraft only with deviations grouped into 300m blocks. 6.8.5 With the analysis being undertaken of average levels per deviation block, it can be seen that the general trend is for higher levels above the monitoring positions. The trends to both extremes become less valid due to the lower number of movements occurring for these blocks. For example, the peak at -1500 metres is derived from a sample of two aircraft only

6.9 Weather and Runway Use 6.9.1 Due to the prevailing weather conditions, Runway 22 is in use the majority of the time at Stansted Airport as can be seen from the attached weather and runway use figures. 6.9.2 Runway 22 was in use approximately 81% of the time during monitoring while Runway 04 was in use approximately 19% of the time. The split of gate penetrations above this monitoring position, as described in Appendix A below, was 94% associated with Runway 22 departures and 4% associated with Runway 04 arrivals.

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Noise Monitoring Report 6.9.3 It can therefore be seen that use of Runway 22 has a more notable effect on this location, due to the routing of aircraft using this runway causing them to be closer to the noise monitor. To ensure sufficient analysis of levels from Runway 22, a number of the above figures are reset below showing only data collected during Runway 22 movements.

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Noise Monitoring Report

6.9.4 It can be seen from the above that noise levels during Runway 22 correlated events are equivalent to the typical levels measured over the entirety of the survey. Therefore, it can be taken that the data presentation methodology used in this report suitably indicates the effect of Runway 22 movements on the measurement position.

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Noise Monitoring Report 7 Conclusions 7.1 Noise levels have been measured over an extended period at two locations to the north and west of Stansted Airport. During the period covered by this report, aircraft operated on southwesterly (Runway 22) movements for the majority of the time at 82% of movements, with 18% of movements on the north-easterly Runway 04. This reflects the prevailing weather conditions at Stansted. Conversely, Runway 22 departures accounted for 94% of noted aircraft movements above the monitoring position. Runway 04 arrivals accounted for 4% of noted aircraft movements above the monitoring position. Runway 22 arrivals, other overflights and helicopter movements accounted for the remainder of correlated events. 7.2 The measurements indicate that at Hadham the prevailing daytime noise levels are 52 dB LAeq,16h on average and the analysis indicates this is influenced by aircraft movements. It is worth noting that this level sits below the WHO guideline limit for external amenity areas of 55 dB LAeq,16h. 7.3 Average and maximum daily N60 and N70 events which have been correlated with aircraft movements are seen to sit notably below a level where impact would typically be considered. Additional visual representations of LAmax levels during correlated aircraft flyovers are provided for reference.

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End of Section

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P108 Figure 17/0484/F1

Title: Site Plan showing noise and weather monitoring locations

W10

Figure Key W

Weather Monitoring Location Noise Monitoring Locations

P109

Debden

P109

Hadham

North

W99

P108

Project: Stansted Airport Monitoring 2017

Date:

Revision:

October 2017

-

Scale: Not to scale

W3

Cole Jarman Limited t +44 (0)1932 829007 f +44 (0)1932 829003 John Cree House, 24B High Street, Addlestone, Surrey KT15 1TN e [email protected] w www.colejarman.com

80

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Figure 17/0484/L2A

90

Stansted Airport

21:00 16:00 11:00 06:00 01:00 20:00 15:00 10:00 05:00 00:00 19:00 14:00 09:00 04:00

23:00 18:00 13:00 08:00 03:00 22:00 17:00 12:00 07:00 02:00 21:00 16:00 11:00 06:00 01:00 20:00 15:00 10:00 05:00

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Measurement Time

Total Community Aircraft

LAeq Time History at Position Hadham, 17 to 24 July 2017

Figure 17/0484/L2B

90

Stansted Airport

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LAeq Time History at Position Hadham, 24 to 31 July 2017

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Figure 17/0484/L2C

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Stansted Airport

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LAeq Time History at Position Hadham, 31 July to 7 August 2017

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Figure 17/0484/L2D

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Stansted Airport

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Total Community Aircraft

LAeq Time History at Position Hadham, 7 to 14 August 2017

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Figure 17/0484/L2E

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Total Community Aircraft

LAeq Time History at Position Hadham, 14 to 21 August 2017

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Figure 17/0484/L2F

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Stansted Airport

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LAeq Time History at Position Hadham, 21 to 28 August 2017

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Figure 17/0484/L2G

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LAeq Time History at Position Hadham, 28 August to 4 September 2017

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0

Figure 17/0484/L2H

90

Stansted Airport

60

50 Sound Level, dB

00:00 16:00 08:00 00:00 16:00 08:00 00:00 16:00 08:00 00:00 16:00 08:00 00:00

16:00 08:00 00:00 16:00

08:00 00:00 16:00 08:00

00:00

Measurement Time

Total Community Aircraft

LAeq Time History at Position Hadham, 4 to 11 September 2017

80

70

40

30

20

10

0

Figure 17/0484/L2I

90

Stansted Airport

60

50 Sound Level, dB

00:00 16:00 08:00 00:00 16:00 08:00 00:00 16:00 08:00 00:00 16:00 08:00 00:00

16:00 08:00 00:00 16:00

08:00 00:00 16:00 08:00

00:00

Measurement Time

Total Community Aircraft

LAeq Time History at Position Hadham, 11 to 18 September 2017

80

70

40

30

20

10

0

Figure 17/0484/L2J

90

Stansted Airport

60

50 Sound Level, dB

00:00 16:00 08:00 00:00 16:00 08:00 00:00 16:00 08:00 00:00 16:00 08:00 00:00

16:00 08:00 00:00 16:00

08:00 00:00 16:00 08:00

00:00

Measurement Time

Total Community Aircraft

LAeq Time History at Position Hadham, 18 to 25 September 2017

80

70

40

30

20

10

0

Schedule

17/0484/SCH2

Noise Levels at Hadham (P109) as Measured

Period Average 17-18 July 18-19 July 19-20 July 20-21 July 21-22 July 22-23 July 23-24 July 24-25 July 25-26 July 26-27 July 27-28 July 28-29 July 29-30 July 30-31 July 31-1 August 1-2 August 2-3 August 3-4 August 4-5 August 5-6 August 6-7 August 7-8 August 8-9 August 9-10 August 10-11 August 11-12 August 12-13 August 13-14 August 14-15 August 15-16 August 16-17 August 17-18 August 18-19 August 19-20 August 20-21 August 21-22 August 22-23 August 23-24 August 24-25 August 25-26 August 26-27 August Page 1 of 6

LAeq,16hi

LDayii

LEveningiii

LNightiv

Ldenv

52 47.9 51.0 52.4 53.0 54.1 51.0 51.2 49.0 50.2 55.6 53.0 50.9 51.8 51.2 52.1 50.4 54.7 52.4 52.3 52.3 50.6 50.0 54.1 50.9 52.1 51.0 51.2 52.1 50.6 53.6 50.9 53.4 52.3 51.3 49.3 51.2 50.6 52.6 58.5 52.4

52 47.9 51.0 52.9 53.8 55.1 51.4 51.8 49.6 50.3 56.6 53.3 51.7 52.4 51.5 52.2 50.8 55.5 52.8 53.1 53.0 50.8 50.3 54.6 51.4 52.5 51.9 51.7 51.3 50.7 54.4 51.4 54.1 53.1 51.8 49.2 51.0 50.6 52.9 59.5 53.1

50 46.2 47.6 51.0 49.9 49.5 47.3 49.6 48.9 46.3 49.7 48.8 52.1 47.2 49.0 50.5 51.5 48.6 51.0 50.8 48.8 48.3 49.9 49.1 52.6 48.9 50.6 46.6 49.2 53.7 50.5 50.3 49.0 50.7 47.7 49.0 49.6 51.8 50.6 51.6 52.4 49.0

46 42.6 65.4 44.9 45.1 46.7 45.3 47.0 43.0 44.0 45.4 45.9 47.1 49.0 45.8 46.0 45.1 47.5 46.6 45.0 47.1 45.2 45.2 41.9 49.7 48.4 45.6 46.5 46.5 44.8 46.1 45.0 46.6 45.7 44.3 45.3 43.4 46.0 46.3 46.9 46.6 44.0

55 70.7 53.7 54.1 55.1 54.8 54.5 52.6 51.8 53.4 56.0 55.6 55.6 54.1 54.2 54.2 54.6 56.0 54.2 55.0 53.9 53.5 51.7 57.4 55.3 54.3 54.0 54.3 54.6 54.0 54.8 54.2 55.0 53.5 53.6 52.1 54.4 54.2 55.3 58.4 53.6

Stansted Airport Noise Monitoring 2017

Schedule

Period 27-28 August 28-29 August 29-30 August 30-31 August 31-1 September 1-2 September 2-3 September 3-4 September 4-5 September 5-6 September 6-7 September 7-8 September 8-9 September 9-10 September 10-11 September 11-12 September 12-13 September 13-14 September 14-15 September 15-16 September 16-17 September 17-18 September 18-19 September 19-20 September 20-21 September 21-22 September

17/0484/SCH2

LAeq,16hi 50.6 50.3 50.3 50.2 53.6 50.4 54.3 51.0 50.0 50.5 51.6 52.1 53.0 53.9 52.6 53.7 51.5 54.0 53.4 52.8 51.6 48.8 50.6 50.2 51.3 50.5

LDayii 51.2 50.6 50.9 50.8 54.3 49.9 55.1 51.5 50.5 50.7 52.2 52.4 53.4 54.7 52.6 54.3 51.6 54.4 53.9 53.7 52.4 49.0 50.6 49.7 51.5 50.5

LEveningiii 47.7 48.8 48.3 47.6 50.3 51.7 50.1 49.0 48.0 49.6 48.8 50.8 51.3 49.3 52.6 51.4 51.5 52.8 51.1 48.4 48.3 48.3 50.4 51.4 50.6 50.3

LNightiv 44.6 45.5 46.0 47.9 47.5 44.7 46.2 43.9 42.4 44.8 45.9 45.5 46.1 45.4 47.0 44.9 58.8 47.5 46.6 46.3 43.2 43.0 44.8 46.4 44.3 46.5

Ldenv 52.9 53.3 53.6 54.7 55.8 53.5 55.5 52.9 51.7 53.2 54.0 54.3 55.0 54.9 55.5 54.9 64.3 56.3 55.4 54.7 52.8 51.5 53.3 54.2 53.4 54.2

Equivalent continuous sound pressure level (LAeq) over the 16-hour day period of 0700h to 2300h Equivalent continuous sound pressure level (LAeq) over the 12-hour day period of 0700h to 1900h iii Equivalent continuous sound pressure level (LAeq) over the 4-hour evening period of 1900h to 2300h iv Equivalent continuous sound pressure level (LAeq) over the 8-hour night period of 2300h to 0700h v Composite level to represent single day with weighting to represent impact during evening and night time periods i

ii

Page 2 of 6

Stansted Airport Noise Monitoring 2017

Schedule

17/0484/SCH2

Community Noise Levels at Hadham (P109) – Aircraft Incidences Removed

Period Average 17-18 July 18-19 July 19-20 July 20-21 July 21-22 July 22-23 July 23-24 July 24-25 July 25-26 July 26-27 July 27-28 July 28-29 July 29-30 July 30-31 July 31-1 August 1-2 August 2-3 August 3-4 August 4-5 August 5-6 August 6-7 August 7-8 August 8-9 August 9-10 August 10-11 August 11-12 August 12-13 August 13-14 August 14-15 August 15-16 August 16-17 August 17-18 August 18-19 August 19-20 August 20-21 August 21-22 August 22-23 August 23-24 August 24-25 August Page 3 of 6

LAeq,16hvi 49 47.6 49.2 50.3 51.3 52.9 47.2 50.9 48.0 47.6 54.4 51.4 46.6 49.0 46.7 47.8 48.0 53.6 49.0 48.9 49.9 46.8 46.5 54.1 50.7 48.6 47.5 47.1 49.7 46.3 51.5 48.0 50.4 48.8 47.4 45.9 47.4 47.0 49.9

LDayvii 50 47.7 50.0 51.2 52.2 54.0 47.6 51.6 48.5 48.1 55.4 51.3 47.1 49.6 47.1 48.4 48.4 54.6 49.7 49.6 50.8 47.3 46.8 54.5 51.2 49.3 48.2 47.2 47.7 46.7 52.6 48.7 51.3 49.6 48.0 46.4 46.9 47.5 50.7

LEveningviii 47 45.9 47.4 45.3 44.9 45.9 43.9 45.7 47.6 45.9 45.5 46.9 51.8 44.5 46.8 45.5 45.4 46.7 46.9 45.4 45.2 44.6 44.9 45.6 52.7 48.7 45.4 44.3 47.0 53.0 45.0 44.0 45.4 45.9 44.7 44.6 43.9 48.8 45.0 46.2

LNightix 44 42.6 65.5 42.5 43.9 45.5 41.3 44.5 43.0 41.0 42.9 44.2 45.4 49.1 41.3 43.8 42.9 45.9 44.0 44.2 45.0 41.5 42.9 40.7 49.7 47.0 43.2 43.4 44.3 43.7 44.3 44.0 41.8 45.7 43.6 41.7 41.1 43.5 42.6 44.9

Stansted Airport Noise Monitoring 2017

Ldenx 53 70.8 51.0 52.1 53.5 52.6 51.5 52.3 49.9 50.6 54.6 54.2 54.9 50.6 50.9 50.7 52.8 54.0 51.8 52.3 50.9 50.3 49.2 57.4 54.3 51.2 50.8 51.5 53.3 51.1 52.7 50.2 53.3 51.4 49.8 48.9 51.4 50.2 52.6

Schedule

Period 25-26 August 26-27 August 27-28 August 28-29 August 29-30 August 30-31 August 31-1 September 1-2 September 2-3 September 3-4 September 4-5 September 5-6 September 6-7 September 7-8 September 8-9 September 9-10 September 10-11 September 11-12 September 12-13 September 13-14 September 14-15 September 15-16 September 16-17 September 17-18 September 18-19 September 19-20 September 20-21 September 21-22 September

17/0484/SCH2

LAeq,16hvi 57.9 50.0 49.9 46.1 47.8 49.8 51.8 50.1 54.1 47.5 47.2 47.7 47.5 48.8 50.2 52.3 50.1 51.6 48.3 52.2 50.7 50.8 48.4 48.5 49.7 47.7 47.6 48.0

LDayvii 59.1 50.7 50.6 46.2 47.8 50.6 52.7 49.4 55.1 48.1 47.8 48.2 48.0 49.2 50.8 53.2 50.5 52.5 47.7 53.0 51.0 51.4 48.9 48.9 50.0 48.1 48.0 48.5

LEveningviii 46.7 46.2 46.2 45.7 47.8 45.3 46.9 51.7 47.2 45.0 44.6 46.1 45.5 47.6 47.7 47.6 48.5 47.3 49.9 48.9 49.3 47.7 46.4 46.8 48.7 46.5 45.7 45.9

LNightix 44.7 44.0 41.7 43.7 46.0 45.7 46.4 44.7 44.4 42.5 41.6 43.0 43.1 42.8 43.8 42.6 44.5 42.3 59.2 45.6 44.2 43.4 42.2 43.0 44.4 43.3 41.7 45.3

Ldenx 57.2 52.2 51.1 50.7 52.9 53.0 54.2 53.4 54.5 50.3 49.7 50.8 50.7 51.3 52.3 52.9 52.7 52.4 64.6 54.2 52.9 52.4 50.7 51.2 52.6 51.0 50.0 52.3

Equivalent continuous sound pressure level (LAeq) over the 16-hour day period of 0700h to 2300h Equivalent continuous sound pressure level (LAeq) over the 12-hour day period of 0700h to 1900h viii Equivalent continuous sound pressure level (LAeq) over the 4-hour evening period of 1900h to 2300h ix Equivalent continuous sound pressure level (LAeq) over the 8-hour night period of 2300h to 0700h x Composite level to represent single day with weighting to represent impact during evening and night time periods vi

vii

Page 4 of 6

Stansted Airport Noise Monitoring 2017

Schedule

17/0484/SCH2

Aircraft Noise Levels at Hadham (P109) – Aircraft Incidences only

Period Average 17-18 July 18-19 July 19-20 July 20-21 July 21-22 July 22-23 July 23-24 July 24-25 July 25-26 July 26-27 July 27-28 July 28-29 July 29-30 July 30-31 July 31-1 August 1-2 August 2-3 August 3-4 August 4-5 August 5-6 August 6-7 August 7-8 August 8-9 August 9-10 August 10-11 August 11-12 August 12-13 August 13-14 August 14-15 August 15-16 August 16-17 August 17-18 August 18-19 August 19-20 August 20-21 August 21-22 August 22-23 August 23-24 August 24-25 August 25-26 August Page 5 of 6

LAeq,16hxi 48 39.7 47.1 48.8 48.8 48.4 48.7 41.9 43.5 47.0 50.2 48.4 49.0 48.6 49.4 50.1 46.7 49.6 50.1 49.8 48.6 48.5 47.4 46.4 44.9 49.9 48.6 49.1 48.4 48.7 49.7 48.1 50.9 50.1 49.4 47.2 49.0 48.2 49.6 50.8

LDayxii 48 39.6 45.4 48.6 49.2 49.2 49.1 41.0 44.0 46.7 51.2 49.4 49.9 49.3 49.6 50.0 47.3 49.8 49.9 50.5 49.2 48.6 47.7 47.3 45.4 49.8 49.5 49.9 49.0 48.5 49.9 48.2 51.0 50.8 49.6 46.8 49.0 47.8 49.4 50.7

LEveningxiii 46 37.4 40.1 49.7 49.6 47.2 44.6 47.3 43.4 39.4 47.7 44.3 42.2 43.8 45.1 48.8 50.3 44.2 49.0 50.6 46.5 45.9 48.3 46.5 40.0 41.2 50.3 42.8 45.3 46.2 49.2 49.1 47.7 50.4 45.9 48.4 48.2 48.9 49.3 50.1 51.1

LNightxiv 43 32.8 47.1 43.0 49.5 49.1 46.5 33.2 46.9 46.2 47.1 51.5 36.9 50.0 46.2 47.1 48.5 49.1 46.1 47.3 47.0 45.8 40.1 34.1 47.2 47.9 47.8 46.8 47.5 50.4 47.4 46.8 34.7 45.5 47.1 48.5 46.5 48.1 46.9 46.3

Stansted Airport Noise Monitoring 2017

Ldenxv 53 40.0 53.8 51.8 55.6 55.2 53.4 43.9 52.6 52.9 54.0 57.2 48.9 55.9 53.5 54.4 54.4 55.6 53.9 54.1 53.6 53.0 49.4 46.1 53.0 54.9 54.1 53.5 54.0 56.5 54.4 53.5 51.2 53.0 54.0 54.7 53.6 54.6 54.2 54.3

Schedule

Period 26-27 August 27-28 August 28-29 August 29-30 August 30-31 August 31-1 September 1-2 September 2-3 September 3-4 September 4-5 September 5-6 September 6-7 September 7-8 September 8-9 September 9-10 September 10-11 September 11-12 September 12-13 September 13-14 September 14-15 September 15-16 September 16-17 September 17-18 September 18-19 September 19-20 September 20-21 September 21-22 September

17/0484/SCH2

LAeq,16hxi 49.2 44.7 48.5 47.8 42.9 49.4 41.8 44.8 48.5 46.8 47.4 49.5 49.4 49.9 48.9 49.4 49.8 48.8 50.0 50.3 49.0 49.0 39.9 44.5 47.4 48.9 47.3

LDayxii 49.6 44.5 48.8 48.3 40.8 49.9 42.1 42.9 48.9 47.3 47.6 50.2 49.8 50.1 49.7 48.9 50.0 49.3 49.8 51.0 49.9 49.9 36.2 43.9 45.8 48.9 46.8

LEveningxiii 47.0 45.5 47.2 41.5 46.6 47.7 38.7 47.0 46.7 45.3 46.9 46.1 47.9 48.9 44.5 50.6 49.2 46.7 50.5 46.6 41.3 43.7 43.9 45.5 49.7 48.9 48.3

LNightxiv 47.3 47.0 47.2 43.2 47.6 47.6 44.0 44.4 46.9 46.4 51.3 46.4 45.6 47.4 47.1 49.2 47.1 47.3 45.2 29.7 41.3 47.7 45.2 46.5

Ldenxv 48.6 53.3 53.7 46.2 53.1 51.7 40.8 53.6 54.1 51.1 51.7 53.7 53.5 57.3 53.2 53.4 54.4 53.8 55.8 54.1 53.7 52.3 42.6 48.8 54.2 52.8 53.2

Equivalent continuous sound pressure level (LAeq) over the 16-hour day period of 0700h to 2300h Equivalent continuous sound pressure level (LAeq) over the 12-hour day period of 0700h to 1900h xiii Equivalent continuous sound pressure level (LAeq) over the 4-hour evening period of 1900h to 2300h xiv Equivalent continuous sound pressure level (LAeq) over the 8-hour night period of 2300h to 0700h xv Composite level to represent single day with weighting to represent impact during evening and night time periods xi

xii

Page 6 of 6

Stansted Airport Noise Monitoring 2017

Data at Weather Station 03, 3 to 10 July 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W03A

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

10/07 00:00

09/07 16:00

09/07 08:00

09/07 00:00

08/07 16:00

08/07 08:00

08/07 00:00

07/07 16:00

07/07 08:00

07/07 00:00

06/07 16:00

06/07 08:00

06/07 00:00

05/07 16:00

05/07 08:00

05/07 00:00

04/07 16:00

04/07 08:00

04/07 00:00

03/07 16:00

03/07 08:00

0

0

Wind Direction Degrees

20

03/07 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 03, 10 to 17 July 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W03B

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5

4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

17/07 00:00

16/07 16:00

16/07 08:00

16/07 00:00

15/07 16:00

15/07 08:00

15/07 00:00

14/07 16:00

14/07 08:00

14/07 00:00

13/07 16:00

13/07 08:00

13/07 00:00

12/07 16:00

12/07 08:00

12/07 00:00

11/07 16:00

11/07 08:00

11/07 00:00

10/07 16:00

10/07 08:00

0

0

Wind Direction Degrees

20

10/07 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 03, 17 to 24 July 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W03C

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

24/07 00:00

23/07 16:00

23/07 08:00

23/07 00:00

22/07 16:00

22/07 08:00

22/07 00:00

21/07 16:00

21/07 08:00

21/07 00:00

20/07 16:00

20/07 08:00

20/07 00:00

19/07 16:00

19/07 08:00

19/07 00:00

18/07 16:00

18/07 08:00

18/07 00:00

17/07 16:00

17/07 08:00

0

0

Wind Direction Degrees

20

17/07 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 03, 24 to 31 July 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W03D

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

31/07 00:00

30/07 16:00

30/07 08:00

30/07 00:00

29/07 16:00

29/07 08:00

29/07 00:00

28/07 16:00

28/07 08:00

28/07 00:00

27/07 16:00

27/07 08:00

27/07 00:00

26/07 16:00

26/07 08:00

26/07 00:00

25/07 16:00

25/07 08:00

25/07 00:00

24/07 16:00

24/07 08:00

0

0

Wind Direction Degrees

20

24/07 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 03, 31 July to 7 August 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W03E

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

07/08 00:00

06/08 16:00

06/08 08:00

06/08 00:00

05/08 16:00

05/08 08:00

05/08 00:00

04/08 16:00

04/08 08:00

04/08 00:00

03/08 16:00

03/08 08:00

03/08 00:00

02/08 16:00

02/08 08:00

02/08 00:00

01/08 16:00

01/08 08:00

01/08 00:00

31/07 16:00

31/07 08:00

0

0

Wind Direction Degrees

20

31/07 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 03, 7 to 14 August 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W03F

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

14/08 00:00

13/08 16:00

13/08 08:00

13/08 00:00

12/08 16:00

12/08 08:00

12/08 00:00

11/08 16:00

11/08 08:00

11/08 00:00

10/08 16:00

10/08 08:00

10/08 00:00

09/08 16:00

09/08 08:00

09/08 00:00

08/08 16:00

08/08 08:00

08/08 00:00

07/08 16:00

07/08 08:00

0

0

Wind Direction Degrees

20

07/08 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 03, 14 to 21 August 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W03G

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5

4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

21/08 00:00

20/08 16:00

20/08 08:00

20/08 00:00

19/08 16:00

19/08 08:00

19/08 00:00

18/08 16:00

18/08 08:00

18/08 00:00

17/08 16:00

17/08 08:00

17/08 00:00

16/08 16:00

16/08 08:00

16/08 00:00

15/08 16:00

15/08 08:00

15/08 00:00

14/08 16:00

14/08 08:00

0

0

Wind Direction Degrees

20

14/08 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 03, 21 to 28 August 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W03H

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

28/08 00:00

27/08 16:00

27/08 08:00

27/08 00:00

26/08 16:00

26/08 08:00

26/08 00:00

25/08 16:00

25/08 08:00

25/08 00:00

24/08 16:00

24/08 08:00

24/08 00:00

23/08 16:00

23/08 08:00

23/08 00:00

22/08 16:00

22/08 08:00

22/08 00:00

21/08 16:00

21/08 08:00

0

0

Wind Direction Degrees

20

21/08 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 03, 28 August to 4 September 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W03I

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

04/09 00:00

03/09 16:00

03/09 08:00

03/09 00:00

02/09 16:00

02/09 08:00

02/09 00:00

01/09 16:00

01/09 08:00

01/09 00:00

31/08 16:00

31/08 08:00

31/08 00:00

30/08 16:00

30/08 08:00

30/08 00:00

29/08 16:00

29/08 08:00

29/08 00:00

28/08 16:00

28/08 08:00

0

0

Wind Direction Degrees

20

28/08 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 03, 4 to 11 September 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W03J

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22

21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9

8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

11/09 00:00

10/09 16:00

10/09 08:00

10/09 00:00

09/09 16:00

09/09 08:00

09/09 00:00

08/09 16:00

08/09 08:00

08/09 00:00

07/09 16:00

07/09 08:00

07/09 00:00

06/09 16:00

06/09 08:00

06/09 00:00

05/09 16:00

05/09 08:00

05/09 00:00

04/09 16:00

04/09 08:00

0

0

Wind Direction Degrees

20

04/09 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 03, 11 to 18 September 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W03K

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5

4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

18/09 00:00

17/09 16:00

17/09 08:00

17/09 00:00

16/09 16:00

16/09 08:00

16/09 00:00

15/09 16:00

15/09 08:00

15/09 00:00

14/09 16:00

14/09 08:00

14/09 00:00

13/09 16:00

13/09 08:00

13/09 00:00

12/09 16:00

12/09 08:00

12/09 00:00

11/09 16:00

11/09 08:00

0

0

Wind Direction Degrees

20

11/09 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 03, 18 to 25 September 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W03L

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

25/09 00:00

24/09 16:00

24/09 08:00

24/09 00:00

23/09 16:00

23/09 08:00

23/09 00:00

22/09 16:00

22/09 08:00

22/09 00:00

21/09 16:00

21/09 08:00

21/09 00:00

20/09 16:00

20/09 08:00

20/09 00:00

19/09 16:00

19/09 08:00

19/09 00:00

18/09 16:00

18/09 08:00

0

0

Wind Direction Degrees

20

18/09 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 10, 3 to 10 July 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W10A

Stansted Airport

360

30 29 28 27

315

26 25

24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11

10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

10/07 00:00

09/07 16:00

09/07 08:00

09/07 00:00

08/07 16:00

08/07 08:00

08/07 00:00

07/07 16:00

07/07 08:00

07/07 00:00

06/07 16:00

06/07 08:00

06/07 00:00

05/07 16:00

05/07 08:00

05/07 00:00

04/07 16:00

04/07 08:00

04/07 00:00

03/07 16:00

03/07 08:00

0

0

Wind Direction Degrees

20

03/07 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 10, 10 to 17 July 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W10B

Stansted Airport

360

30 29 28 27

315

26 25

24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11

10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

17/07 00:00

16/07 16:00

16/07 08:00

16/07 00:00

15/07 16:00

15/07 08:00

15/07 00:00

14/07 16:00

14/07 08:00

14/07 00:00

13/07 16:00

13/07 08:00

13/07 00:00

12/07 16:00

12/07 08:00

12/07 00:00

11/07 16:00

11/07 08:00

11/07 00:00

10/07 16:00

10/07 08:00

0

0

Wind Direction Degrees

20

10/07 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 10, 17 to 24 July 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W10C

Stansted Airport

360

30 29 28 27

315

26 25

24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11

10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

24/07 00:00

23/07 16:00

23/07 08:00

23/07 00:00

22/07 16:00

22/07 08:00

22/07 00:00

21/07 16:00

21/07 08:00

21/07 00:00

20/07 16:00

20/07 08:00

20/07 00:00

19/07 16:00

19/07 08:00

19/07 00:00

18/07 16:00

18/07 08:00

18/07 00:00

17/07 16:00

17/07 08:00

0

0

Wind Direction Degrees

20

17/07 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 10, 24 to 31 July 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W10D

Stansted Airport

360

30 29 28 27

315

26 25

24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11

10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

31/07 00:00

30/07 16:00

30/07 08:00

30/07 00:00

29/07 16:00

29/07 08:00

29/07 00:00

28/07 16:00

28/07 08:00

28/07 00:00

27/07 16:00

27/07 08:00

27/07 00:00

26/07 16:00

26/07 08:00

26/07 00:00

25/07 16:00

25/07 08:00

25/07 00:00

24/07 16:00

24/07 08:00

0

0

Wind Direction Degrees

20

24/07 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 10, 31 July to 7 August 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W10E

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

07/08 00:00

06/08 16:00

06/08 08:00

06/08 00:00

05/08 16:00

05/08 08:00

05/08 00:00

04/08 16:00

04/08 08:00

04/08 00:00

03/08 16:00

03/08 08:00

03/08 00:00

02/08 16:00

02/08 08:00

02/08 00:00

01/08 16:00

01/08 08:00

01/08 00:00

31/07 16:00

31/07 08:00

0

0

Wind Direction Degrees

20

31/07 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 10, 7 to 14 August 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W10F

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

14/08 00:00

13/08 16:00

13/08 08:00

13/08 00:00

12/08 16:00

12/08 08:00

12/08 00:00

11/08 16:00

11/08 08:00

11/08 00:00

10/08 16:00

10/08 08:00

10/08 00:00

09/08 16:00

09/08 08:00

09/08 00:00

08/08 16:00

08/08 08:00

08/08 00:00

07/08 16:00

07/08 08:00

0

0

Wind Direction Degrees

20

07/08 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 10, 14 to 21 August 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W10G

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

21/08 00:00

20/08 16:00

20/08 08:00

20/08 00:00

19/08 16:00

19/08 08:00

19/08 00:00

18/08 16:00

18/08 08:00

18/08 00:00

17/08 16:00

17/08 08:00

17/08 00:00

16/08 16:00

16/08 08:00

16/08 00:00

15/08 16:00

15/08 08:00

15/08 00:00

14/08 16:00

14/08 08:00

0

0

Wind Direction Degrees

20

14/08 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 10, 21 to 28 August 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W10H

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

28/08 00:00

27/08 16:00

27/08 08:00

27/08 00:00

26/08 16:00

26/08 08:00

26/08 00:00

25/08 16:00

25/08 08:00

25/08 00:00

24/08 16:00

24/08 08:00

24/08 00:00

23/08 16:00

23/08 08:00

23/08 00:00

22/08 16:00

22/08 08:00

22/08 00:00

21/08 16:00

21/08 08:00

0

0

Wind Direction Degrees

20

21/08 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 10, 28 August to 4 September 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W10I

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

04/09 00:00

03/09 16:00

03/09 08:00

03/09 00:00

02/09 16:00

02/09 08:00

02/09 00:00

01/09 16:00

01/09 08:00

01/09 00:00

31/08 16:00

31/08 08:00

31/08 00:00

30/08 16:00

30/08 08:00

30/08 00:00

29/08 16:00

29/08 08:00

29/08 00:00

28/08 16:00

28/08 08:00

0

0

Wind Direction Degrees

20

28/08 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 10, 4 to 11 September 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W10J

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

11/09 00:00

10/09 16:00

10/09 08:00

10/09 00:00

09/09 16:00

09/09 08:00

09/09 00:00

08/09 16:00

08/09 08:00

08/09 00:00

07/09 16:00

07/09 08:00

07/09 00:00

06/09 16:00

06/09 08:00

06/09 00:00

05/09 16:00

05/09 08:00

05/09 00:00

04/09 16:00

04/09 08:00

0

0

Wind Direction Degrees

20

04/09 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 10, 11 to 18 September 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W10K

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

18/09 00:00

17/09 16:00

17/09 08:00

17/09 00:00

16/09 16:00

16/09 08:00

16/09 00:00

15/09 16:00

15/09 08:00

15/09 00:00

14/09 16:00

14/09 08:00

14/09 00:00

13/09 16:00

13/09 08:00

13/09 00:00

12/09 16:00

12/09 08:00

12/09 00:00

11/09 16:00

11/09 08:00

0

0

Wind Direction Degrees

20

11/09 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 10, 18 to 25 September 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W10L

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

25/09 00:00

24/09 16:00

24/09 08:00

24/09 00:00

23/09 16:00

23/09 08:00

23/09 00:00

22/09 16:00

22/09 08:00

22/09 00:00

21/09 16:00

21/09 08:00

21/09 00:00

20/09 16:00

20/09 08:00

20/09 00:00

19/09 16:00

19/09 08:00

19/09 00:00

18/09 16:00

18/09 08:00

0

0

Wind Direction Degrees

20

18/09 00:00

Precipitation (inch) / Wind Speed (km/h)

23

Measurement Date

Precipitation (in/h)

Runway Direction Wind Direction (deg)

31

30

27

26

23

19

225

18

17

16

15

180

14

13

12

11

135

10

9

8

7

90

6

5

4

Northeasterly Operations (Runway 04) 45

2

1

0

0

Wind Direction Degrees

Mean Wind Speed (km/h)

10/07 16:00

10/07 08:00

10/07 00:00

09/07 16:00

09/07 08:00

09/07 00:00

08/07 16:00

08/07 08:00

08/07 00:00

07/07 16:00

07/07 08:00

07/07 00:00

06/07 16:00

06/07 08:00

06/07 00:00

05/07 16:00

05/07 08:00

05/07 00:00

04/07 16:00

04/07 08:00

04/07 00:00

03/07 16:00

3

03/07 08:00

21

03/07 00:00

Data at Weather Station 99, 3 to 10 July 2017

360

29

28

315

25

24

Figure 17/0484/W99A

Precipitation (inch) / Wind Speed (km/h)

Stansted Airport

22

270

Southwesterly Operations (Runway 22)

20

Data at Weather Station 99, 10 to 17 July 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W99B

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

17/07 23:20

17/07 15:20

17/07 07:20

16/07 23:20

16/07 15:20

16/07 07:20

15/07 23:20

15/07 15:20

15/07 07:20

14/07 23:20

14/07 15:20

14/07 07:20

13/07 23:20

13/07 15:20

13/07 07:20

12/07 23:20

12/07 15:20

12/07 07:20

11/07 23:20

11/07 15:20

11/07 07:20

0

0

Wind Direction Degrees

20

10/07 23:20

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 99, 17 to 24 July 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W99C

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

24/07 23:20

24/07 15:20

24/07 07:20

23/07 23:20

23/07 15:20

23/07 07:20

22/07 23:20

22/07 15:20

22/07 07:20

21/07 23:20

21/07 15:20

21/07 07:20

20/07 23:20

20/07 15:20

20/07 07:20

19/07 23:20

19/07 15:20

19/07 07:20

18/07 23:20

18/07 15:20

18/07 07:20

0

0

Wind Direction Degrees

20

17/07 23:20

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 99, 24 to 31 July 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W99D

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

31/07 23:20

31/07 15:20

31/07 07:20

30/07 23:20

30/07 15:20

30/07 07:20

29/07 23:20

29/07 15:20

29/07 07:20

28/07 23:20

28/07 15:20

28/07 07:20

27/07 23:20

27/07 15:20

27/07 07:20

26/07 23:20

26/07 15:20

26/07 07:20

25/07 23:20

25/07 15:20

25/07 07:20

0

0

Wind Direction Degrees

20

24/07 23:20

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 99, 31 July to 7 August 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W99E

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

07/08 23:20

07/08 15:20

07/08 07:20

06/08 23:20

06/08 15:20

06/08 07:20

05/08 23:20

05/08 15:20

05/08 07:20

04/08 23:20

04/08 15:20

04/08 07:20

03/08 23:20

03/08 15:20

03/08 07:20

02/08 23:20

02/08 15:20

02/08 07:20

01/08 23:20

01/08 15:20

01/08 07:20

0

0

Wind Direction Degrees

20

31/07 23:20

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 99, 7 to 14 August 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W99F

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

14/08 23:20

14/08 15:20

14/08 07:20

13/08 23:20

13/08 15:20

13/08 07:20

12/08 23:20

12/08 15:20

12/08 07:20

11/08 23:20

11/08 15:20

11/08 07:20

10/08 23:20

10/08 15:20

10/08 07:20

09/08 23:20

09/08 15:20

09/08 07:20

08/08 23:20

08/08 15:20

08/08 07:20

0

0

Wind Direction Degrees

20

07/08 23:20

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 99, 14 to 21 August 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W99G

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

21/08 23:20

21/08 15:20

21/08 07:20

20/08 23:20

20/08 15:20

20/08 07:20

19/08 23:20

19/08 15:20

19/08 07:20

18/08 23:20

18/08 15:20

18/08 07:20

17/08 23:20

17/08 15:20

17/08 07:20

16/08 23:20

16/08 15:20

16/08 07:20

15/08 23:20

15/08 15:20

15/08 07:20

0

0

Wind Direction Degrees

20

14/08 23:20

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 99, 21 to 28 August 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W99H

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

28/08 23:20

28/08 15:20

28/08 07:20

27/08 23:20

27/08 15:20

27/08 07:20

26/08 23:20

26/08 15:20

26/08 07:20

25/08 23:20

25/08 15:20

25/08 07:20

24/08 23:20

24/08 15:20

24/08 07:20

23/08 23:20

23/08 15:20

23/08 07:20

22/08 23:20

22/08 15:20

22/08 07:20

0

0

Wind Direction Degrees

20

21/08 23:20

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 99, 28 August to 4 September 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W99I

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

04/09 23:20

04/09 15:20

04/09 07:20

03/09 23:20

03/09 15:20

03/09 07:20

02/09 23:20

02/09 15:20

02/09 07:20

01/09 23:20

01/09 15:20

01/09 07:20

31/08 23:20

31/08 15:20

31/08 07:20

30/08 23:20

30/08 15:20

30/08 07:20

29/08 23:20

29/08 15:20

29/08 07:20

0

0

Wind Direction Degrees

20

28/08 23:20

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 99, 4 to 11 September 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W99J

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

11/09 23:20

11/09 15:20

11/09 07:20

10/09 23:20

10/09 15:20

10/09 07:20

09/09 23:20

09/09 15:20

09/09 07:20

08/09 23:20

08/09 15:20

08/09 07:20

07/09 23:20

07/09 15:20

07/09 07:20

06/09 23:20

06/09 15:20

06/09 07:20

05/09 23:20

05/09 15:20

05/09 07:20

0

0

Wind Direction Degrees

20

04/09 23:20

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 99, 11 to 18 September 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W99K

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

18/09 23:20

18/09 15:20

18/09 07:20

17/09 23:20

17/09 15:20

17/09 07:20

16/09 23:20

16/09 15:20

16/09 07:20

15/09 23:20

15/09 15:20

15/09 07:20

14/09 23:20

14/09 15:20

14/09 07:20

13/09 23:20

13/09 15:20

13/09 07:20

12/09 23:20

12/09 15:20

12/09 07:20

0

0

Wind Direction Degrees

20

11/09 23:20

Precipitation (inch) / Wind Speed (km/h)

23

Data at Weather Station 99, 18 to 25 September 2017

Mean Wind Speed (km/h)

Precipitation (in/h)

Runway Direction

Wind Direction (deg)

31

Figure 17/0484/W99L

Stansted Airport

360

30 29 28 27

315

26 25 24

270

22 21

Southwesterly Operations (Runway 22) 225

19 18 17 16

180

15 14 13 12

135

11 10 9 8

90

7 6 5 4 3

45

Northeasterly Operations (Runway 04)

2 1

Measurement Date

25/09 23:20

25/09 15:20

25/09 07:20

24/09 23:20

24/09 15:20

24/09 07:20

23/09 23:20

23/09 15:20

23/09 07:20

22/09 23:20

22/09 15:20

22/09 07:20

21/09 23:20

21/09 15:20

21/09 07:20

20/09 23:20

20/09 15:20

20/09 07:20

19/09 23:20

19/09 15:20

19/09 07:20

0

0

Wind Direction Degrees

20

18/09 23:20

Precipitation (inch) / Wind Speed (km/h)

23

Noise Monitoring Report

Glossary of Acoustic Terms LAeq: The notional steady sound level (in dB) which over a stated period of time, would have the same A-weighted acoustic energy as the A-weighted fluctuating noise measurement over that period. Values are sometimes written using the alternative expression dB(A) Leq. LAmax: The maximum A-weighted sound pressure level recorded over the period stated. LAmax is sometimes used in assessing environmental noise when occasional loud noises occur, which may have little effect on the LAeq noise level. Unless described otherwise, LAmax is measured using the “slow” sound level meter response. LA10 & LA90: If non-steady noise is to be described, it is necessary to know both its level and degree of fluctuation. The LAn indices are used for this purpose. The term refers to the A-weighted level (in dB) exceeded for n% of the time specified. LA10 is the level exceeded for 10% of the time and as such gives an indication of the upper limit of fluctuating noise. Similarly, LA90 gives an indication of the lower levels of fluctuating noise. It is often used to define the background noise. LA10 is commonly used to describe traffic noise. Values of dB LAn are sometimes written using the alternative expression dB(A) Ln. LAX, LAE or SEL The single event noise exposure level which, when maintained for 1 second, contains the same quantity of sound energy as the actual time varying level of one noise event. LAX values for contributing noise sources can be considered as individual building blocks in the construction of a calculated value of LAeq for the total noise. The LAX term can sometimes be referred to as Exposure Level (LAE) or Single Event Level (SEL).



End of Section

Page 25 Glossary of Acoustic Terms

Stansted Airport, 109 Hadham Report 17/0484/R2/1 // 27 October 2017

Noise Monitoring Report

Appendix A Gate Penetration Information for P109 Hadham In order to establish both Runway 22 departure movements and Runway 04 arrival movements, two gates were set up. The following graphs set out the height and lateral position of aircraft passing through the gates above the measurement position at Hadham. The first figure shows the Runway 22 departures gate while the second figure shows the Runway 04 arrivals gate.

Page 26 Appendix A

Stansted Airport, 109 Hadham Report 17/0484/R2/1 // 27 October 2017

Noise Monitoring Report The following images set out the gate locations at Hadham. The gate was centred above the monitor location and was set to capture any movements associated with Stansted Airport from ground level to 10,000ft with a width of 6,000m (i.e. gat penetration is ± 3,000m. The first figure shows the Runway 22 departures gate and the second figure shows the Runway 04 arrivals gate.



End of Section

Page 27 Appendix A

Stansted Airport, 109 Hadham Report 17/0484/R2/1 // 27 October 2017

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