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

21/02/2021 10:33:59

Location

MARLOW-WEST , BUCKINGHAMSHIRE , SL7 2JN

Baseline geo-coordinates

51.572 , -0.796143

Survey type

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

Assessment band

EXTREMELY HIGH

Assessment actual value

30.91

Assessment description

Sound equates to a busy Motorway i.e. very regular traffic that will be noticeable at peak times which includes evenings and weekends. Location is on a flight path or primary flight corridor and subject to Arrivals and Departures. At times there will be multiple flight occurrences within the same hour, typically between 15 to 20.

Band range

Lower: 30.0 --> Upper: 1000.0

Flight holding stack identified?

No

Count of Flights & Height Band

Assessment Period / Daily Avg. / Hourly Avg.

Count of ALL flights

13,418 / 144.3 / 8.5 (5,599)

Flights above 26k feet.

2,687 / 28.9 / 1.7 (1,267)

Flights between 16k and 26k feet

1,710 / 18.4 / 1.1 (735)

Flights between 13k and 15k feet

128 / 1.4 / 0.1

Flights between 7k and 12k feet

1,269 / 13.6 / 0.8 (1,252)

Flights between 6k and 7k feet

2,559 / 27.5 / 1.6 (346)

Flights between 5k and 6k feet

3,368 / 36.2 / 2.1 (408)

Flights between 4k and 5k feet

1,381 / 14.8 / 0.9 (377)

Flights between 3k and 4k feet

166 / 1.8 / 0.1

Flights below 3k feet

150 / 1.6 / 0.1

4 or more flights per hour

582 / 6.3 (375)

9 or more flights per hour

454 / 4.9 (131)

Departures between 1.5k and 15k feet

326 / 3.5 / 0.2

Count of Flights by Hour Band

Assessment Period / Day / Hourly Average

0 AM

26 / 0.3

1 AM

30 / 0.3

2 AM

13 / 0.1

3 AM

24 / 0.3

4 AM

76 / 0.8

5 AM

290 / 3.1

6 AM

839 / 9.0

7 AM

984 / 10.6

8 AM to 9 PM

10,675 / 114.8 / 8.2

10 PM

190 / 2.0

11 PM

55 / 0.6

Averages over assessment period

Time in seconds an aircraft existed in the Airspace Bubble

20 (18)

Altitude for all flights

13,939 (19,766)

Altitude of departures between 1.5k and 15k feet

10,422

Altitude of flights below 20k feet

6,693 (9,422)

Number of disruptions per day

96.0 (40)

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

47 (44)

Minimum distance from base in miles

0.41

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

Period and Frequency

24.50

Monday @ 17:00 - 8 time(s) in 13 weeks. Approx:14 flight events.

22.69

Saturday @ 19:00 - 8 time(s) in 13 weeks. Approx:13 flight events.

20.06

Wednesday @ 7:00 - 8 time(s) in 13 weeks. Approx:11 flight events.

17.88

Thursday @ 9:00 - 8 time(s) in 13 weeks. Approx:10 flight events.

17.06

Thursday @ 7:00 - 8 time(s) in 13 weeks. Approx:10 flight events.

30.93

Monday @ 18:00 - 7 time(s) in 13 weeks. Approx:18 flight events.

26.79

Saturday @ 8:00 - 7 time(s) in 13 weeks. Approx:15 flight events.

26.64

Monday @ 8:00 - 7 time(s) in 13 weeks. Approx:15 flight events.

26.07

Saturday @ 7:00 - 7 time(s) in 13 weeks. Approx:14 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.