Assessment ScoreCard – 31 Day

Aircraft Traffic Assessment: 31 Day Scorecard



The symbol indicates the measure is better than the average when compared with other assessed
UK postcodes. The ❌ represents the opposite. Assessed averages are shown in brackets.

See: for a full explanation about the Assessment scorecard.

Assessment Scorecard headlines

All Assessments are based on an ambient background noise of 40 decibels i.e. a quiet residential area. If your property is located near to a busy road i.e. 70-75 decibels, the noise impact from aircraft will be significantly reduced, whilst the road remains busy.

Note: Airborne aircraft noise is typically in the range of 45dB - 65dB for heights below 26,000 feet and for a duration of 30-50 seconds. Whereas the average car, bus or HGV the duration is only a few seconds.

Date of survey

13/05/2021 18:20:30

UK Postcode

WEST-LEIGH-ON-SEA , ESSEX , SS9 2NQ

Baseline geo-coordinates

51.5435 , 0.640426

Survey type

31 Day. Based on the 31 days prior to the survey date shown above.

Assessment band

MINIMAL

Assessment actual value

3.53

Assessment description

Sound equates to a quiet country lane i.e. irregular and low volume traffic. However, occasionally some of the flights could be below 7000 feet and could occur at evenings and weekends.

Band range

Lower: 0.0 --> Upper: 4.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

532 / 17.2 / 1.0

Flights above 26k feet.

235 / 7.6 / 0.4 (218)

Flights between 16k and 26k feet

61 / 2.0 / 0.1

Flights between 13k and 15k feet

7 / 0.2 / 0.0

Flights between 7k and 12k feet

11 / 0.4 / 0.0

Flights between 6k and 7k feet

1 / 0.0 / 0.0

Flights between 5k and 6k feet

5 / 0.2 / 0.0

Flights between 4k and 5k feet

3 / 0.1 / 0.0

Flights between 3k and 4k feet

10 / 0.3 / 0.0

Flights below 3k feet

199 / 6.4 / 0.4

4 or more flights per hour

0 / 0.0

9 or more flights per hour

0 / 0.0

Departures between 1.5k and 15k feet

44 / 1.4 / 0.1

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

5 / 0.2

1 AM

6 / 0.2

2 AM

13 / 0.4

3 AM

14 / 0.5

4 AM

3 / 0.1

5 AM

4 / 0.1

6 AM

9 / 0.3

7 AM

21 / 0.7

8 AM to 9 PM

305 / 9.8 / 0.7

10 PM

12 / 0.4

11 PM

18 / 0.6

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

41 (21)

Percentage of overflying occuring Out-Of-Hours and at Weekends

19

Minimum avg. distance in miles

0.36

Number of possible disruptions by; day / out-of-hours / hour

3.0 / 1.0 / 0.2

Flight holding stack identified?

No

Altitude for all flights

23,415

Altitude of departures between 1.5k and 15k feet

2,836 (7,836)

Altitude of flights below 20k feet

6,218 (7,529)

Busiest times of day
(Distruption: 0 - low, 25+ high)

Day of week, time, frequency and number of flight events.

3.13

Wednesday @ 12:00 - 4 time(s) in 4 weeks. Approx:2 flight events.

3.50

Thursday @ 14:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

3.25

Friday @ 13:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

3.00

Wednesday @ 13:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

2.50

Thursday @ 12:00 - 2 time(s) in 4 weeks. Approx:2 flight events.

6.00

Friday @ 9:00 - 1 time(s) in 4 weeks. Approx:3 flight events.

5.00

Wednesday @ 10:00 - 1 time(s) in 4 weeks. Approx:4 flight events.

Our scorecard is designed to provide a greater understanding how the assessment was reached for your selected UK post code. To enable you to validate our assessment we also provide up to 10 occurrences when we believe the disruption will be at its highest.

For those that would like to perform their own analysis we can also provide the low level flight data that includes the length of time a plane existed inside your select airspace bubble.



Flights by Airport (less than 1% are excluded): WEST-LEIGH-ON-SEA SS9 2NQ (ESSEX)

UK Airport Count of Flights Percentage of Total
NON UK AIRPORT18535.6
SOUTHEND AIRPORT6312.1
LONDON BIGGIN HILL AIRPORT417.9
EAST MIDLANDS AIRPORT234.4
LONDON LUTON AIRPORT224.2
LONDON STANSTED AIRPORT183.5
STAPLEFORD AERODROME163.1
FARNBOROUGH AIRPORT163.1
NORTH WEALD AIRPORT152.9
UNKNOWN AIRPORT152.9
LYDD AIRPORT112.1
LONDON GATWICK AIRPORT91.7
LONDON HEATHROW AIRPORT81.5
BOURNEMOUTH AIRPORT81.5
UNKNOWN UK AIRPORT81.5
LONDON CITY AIRPORT61.2

Flight evidence for location: ()

Event_date_time Event_date_time_hidden Call Sign ICAO24 UK Airport Direction Altitude (feet) Distance (miles) Airspace (seconds)
Event_date_time Event_date_time_hidden Call Sign ICAO24 Airport Direction Altitude (feet) Distance (miles) Airspace (seconds)