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

15/04/2021 10:46:26

UK Postcode

COURT-LANE-DULWICH , LONDON , SE21 7EE

Baseline geo-coordinates

51.4476 , -0.074939

Survey type

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

Assessment band

OCCASIONAL

Assessment actual value

5.54

Assessment description

Sound equates to a "C" road or an active country lane i.e. irregular traffic volumes. Location is on a flight route as opposed to a flight corridor. Some of the flights will be below 7000 feet and could occur at evenings and weekends.

Band range

Lower: 4.0 --> Upper: 7.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

770 / 24.8 / 1.5

Flights above 26k feet.

137 / 4.4 / 0.3

Flights between 16k and 26k feet

31 / 1.0 / 0.1

Flights between 13k and 15k feet

6 / 0.2 / 0.0

Flights between 7k and 12k feet

4 / 0.1 / 0.0

Flights between 6k and 7k feet

0

Flights between 5k and 6k feet

6 / 0.2 / 0.0

Flights between 4k and 5k feet

251 / 8.1 / 0.5 (135)

Flights between 3k and 4k feet

264 / 8.5 / 0.5 (148)

Flights below 3k feet

71 / 2.3 / 0.1

4 or more flights per hour

38 / 1.2

9 or more flights per hour

0 / 0.0

Departures between 1.5k and 15k feet

2 / 0.1 / 0.0

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

0 AM

4 / 0.1

1 AM

3 / 0.1

2 AM

4 / 0.1

3 AM

7 / 0.2

4 AM

5 / 0.2

5 AM

24 / 0.8

6 AM

61 / 2.0

7 AM

68 / 2.2

8 AM to 9 PM

557 / 18.0 / 1.3

10 PM

6 / 0.2

11 PM

4 / 0.1

Other Noise Disturbance, Vibration and Emissions factors

Time in seconds an aircraft existed in the airspace bubble

24 (21)

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

35

Minimum avg. distance in miles

0.44

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

15.0 / 5.0 / 0.8

Flight holding stack identified?

No

Altitude for all flights

10,459 (16,161)

Altitude of departures between 1.5k and 15k feet

7,625 (7,830)

Altitude of flights below 20k feet

4,490 (7,528)

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

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

7.50

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

7.13

Tuesday @ 7:00 - 4 time(s) in 4 weeks. Approx:4 flight events.

6.63

Tuesday @ 6:00 - 4 time(s) in 4 weeks. Approx:4 flight events.

6.25

Tuesday @ 8:00 - 4 time(s) in 4 weeks. Approx:4 flight events.

9.00

Monday @ 7:00 - 3 time(s) in 4 weeks. Approx:5 flight events.

7.67

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

6.50

Wednesday @ 7:00 - 3 time(s) in 4 weeks. Approx:4 flight events.

6.33

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

5.67

Monday @ 9:00 - 3 time(s) in 4 weeks. Approx:3 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): COURT-LANE-DULWICH SE21 7EE (LONDON)

UK Airport Count of Flights Percentage of Total
LONDON HEATHROW AIRPORT54378.8
NON UK AIRPORT558.0
LONDON CITY AIRPORT334.8
LONDON STANSTED AIRPORT142.0
LONDON LUTON AIRPORT81.2

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)