Assessment ScoreCard – Full

Aircraft Traffic Assessment: Full 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.

Summary Overview

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

01/03/2021 11:20:06

Location

SYDENHAM-HILL , LONDON , SE26 6RY

Baseline geo-coordinates

51.4348 , -0.071447

Survey type

Full. Based on 93 days in 2019, during Mid Dec to Mid Jan, whole of April and August.

Assessment band

FREQUENT

Assessment actual value

12.84

Assessment description

Sound equates to an "A" road or a busy "B" road i.e. regular traffic that will be noticeable at peak times which includes evenings and weekends. Location is on a primary flight corridor or flight route or in a flight holding stack area. At times there will be multiple flight occurrences within the same hour, typically between 4-10. Some of the flights will be below 7000 feet.

Band range

Lower: 12.0 --> Upper: 16.0

Flight holding stack identified?

No

Count of Flights & Height Band

Assessment Period / Daily Avg. / Hourly Avg.

Count of ALL flights

7,459 / 80.2 / 4.7 (5,785)

Flights above 26k feet.

1,469 / 15.8 / 0.9 (1,285)

Flights between 16k and 26k feet

343 / 3.7 / 0.2

Flights between 13k and 15k feet

213 / 2.3 / 0.1

Flights between 7k and 12k feet

350 / 3.8 / 0.2

Flights between 6k and 7k feet

242 / 2.6 / 0.2

Flights between 5k and 6k feet

709 / 7.6 / 0.4 (450)

Flights between 4k and 5k feet

1,691 / 18.2 / 1.1 (426)

Flights between 3k and 4k feet

466 / 5.0 / 0.3 (341)

Flights below 3k feet

1,976 / 21.2 / 1.2 (760)

4 or more flights per hour

700 / 7.5 (383)

9 or more flights per hour

146 / 1.6 (137)

Departures between 1.5k and 15k feet

536 / 5.8 / 0.3

Count of Flights by Hour Band

Assessment Period / Day / Hourly Average

0 AM

24 / 0.3

1 AM

23 / 0.2

2 AM

8 / 0.1

3 AM

19 / 0.2

4 AM

26 / 0.3

5 AM

113 / 1.2

6 AM

342 / 3.7

7 AM

574 / 6.2

8 AM to 9 PM

5,947 / 63.9 / 4.6

10 PM

254 / 2.7

11 PM

75 / 0.8

Averages over assessment period

Time in seconds an aircraft existed in the Airspace Bubble

22 (18)

Altitude for all flights

10,866 (19,794)

Altitude of departures between 1.5k and 15k feet

9,550

Altitude of flights below 20k feet

4,857 (9,360)

Number of potential disruptions per day / during out-of-hours

59.0 / 24.0 (41)

Percentage of Pass-bys that occur Out-Of-Hours and at Weekends

40

Minimum distance from base in miles

0.50

Scale of regular disruption
(0 - low, 25+ high)

Period and Frequency

8.88

Monday @ 16:00 - 13 time(s) in 13 weeks. Approx:5 flight events.

8.04

Thursday @ 21:00 - 13 time(s) in 13 weeks. Approx:5 flight events.

13.38

Tuesday @ 8:00 - 12 time(s) in 13 weeks. Approx:8 flight events.

9.96

Wednesday @ 10:00 - 12 time(s) in 13 weeks. Approx:6 flight events.

9.54

Wednesday @ 11:00 - 12 time(s) in 13 weeks. Approx:6 flight events.

8.88

Wednesday @ 21:00 - 12 time(s) in 13 weeks. Approx:5 flight events.

8.63

Tuesday @ 16:00 - 12 time(s) in 13 weeks. Approx:5 flight events.

7.67

Thursday @ 12:00 - 12 time(s) in 13 weeks. Approx:4 flight events.

7.13

Tuesday @ 14:00 - 12 time(s) in 13 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.