Comparison Assessment for ASCOT 2016 vs. 2019 – 2 Minute AIRCRAFT Noise Assessments. nobody likes unpleasant surprises!

The following is a comparison between two Aircraft Traffic Assessments, one based on 2016 data points the other based on 2019 data points. Data prior to 2016 was not available for analysis.

Findings

There has been no change in the Aircraft Disruption Band which is Frequent i.e. Sound equates to a “B” road or busy “C” road i.e. regular traffic that will be noticeable at peak times which includes evenings and weekends. Location is on a secondary flight corridor or flight route. At times there will be multiple aircraft occurrences within the same hour, typically 4. There are aircraft at below 7,000 feet.
The number of daily disruptions* has grown from 12 to 24 due an increase in; a) out-of-hours flights, b) increase in flights below 7,000 feet, c) flights moving slower across the airspace, d) greater density/intensity of flights at certain time i.e. more flights are being grouped together in the same hour as highlighted by the 4 and 9 flight measures.
The location is subject to being “overflown” at various heights by aircraft not using Heathrow. See the 31 Day Assessment for a list for flights.

* See our article about the disruption index . The index does not take into consideration the mix of aircraft types. The very large aircraft such as the A380-800 tend to create an air disturbance that is noticeable from inside the house. The larger planes also tend to fly lower, have more volume and therefore have a greater visual impact.

Assessment ScoreCard – Full – Aircraft Traffic Assessment – sponsoring and sharing the hard facts by UK postcode

Aircraft Traffic Assessment: Full Scorecard (2016)

The ✔ symbol indicates the measure is better than the average when compared with other assessed
UK postcodes. Averages are shown in brackets.

See: for a full explanation about the Assessment scorecard.

Summary
Date of survey	16/11/2020 17:03:49
Location	ASCOT , BERKSHIRE , SL5 8NQ
Baseline geo-coordinates	51.4173 , -0.6922
Survey type	Full (2016). Based on 93 days activity over Mid Dec to Mid Jan, whole of April and August
Assessment disruption band	FREQUENT
Assessment actual value	9.39
Assessment description	Sound equates to a “B” road or busy “C” road i.e. regular traffic that will be noticeable at peak times which includes evenings and weekends. Location is on a secondary flight corridor or flight route or in a flight holding stack area. At times there will be multiple aircraft occurances within the same hour, typically 4. Some of the aircraft will be below 7000 feet.
Band range	Lower: 7.0 –> Upper: 12.0
Flight holding stack identified?	No

Count of types of disruption
All flights below 26,000 feet	4,091 ✔
Flights below 20,000 feet	1,617 ✔
Flights between 7,000 and 12,000 feet	961 ✔
Flights below 7000 feet	319 ✔
4 or more flights per hour	160 ✔
9 or more flights per hour	17 ✔
Departures between 1,500 and 15,000 feet	304 ❌ (231)

Average occurances
Time in seconds an aircraft existed in the Airspace Bubble	13 ✔
Altitude for all flights	23,169 ✔
Altitude of departures between 1,500 and 15,000 feet	7,855 ❌ (9,362)
Altitude of flights below 20,000 feet	9,751 ✔
Number of disruptions per day	12 ✔
Percentage of disruptions that occur Out-Of-Hours and at Weekends	32 ✔
Distance from baseline in miles	0.67

Scale of regular disruption (0 – low, 25+ high)	Period and Frequency
9.10	Tuesday @ 14:00 – 5 time(s) in 13 weeks
7.10	Thursday @ 14:00 – 5 time(s) in 13 weeks
6.60	Wednesday @ 16:00 – 5 time(s) in 13 weeks
5.50	Thursday @ 17:00 – 5 time(s) in 13 weeks
5.40	Saturday @ 17:00 – 5 time(s) in 13 weeks
4.30	Thursday @ 20:00 – 5 time(s) in 13 weeks
4.10	Thursday @ 16:00 – 5 time(s) in 13 weeks
3.30	Monday @ 20:00 – 5 time(s) in 13 weeks
9.63	Saturday @ 16:00 – 4 time(s) in 13 weeks

Aircraft Traffic Assessment: Full Scorecard (2019)

The ✔ symbol indicates the measure is better than the average when compared with other assessed
UK postcodes. Averages are shown in brackets.

See: for a full explanation about the Assessment scorecard.

Summary
Date of survey	16/11/2020 17:28:59
Location	ASCOT , BERKSHIRE , SL5 8NQ
Baseline geo-coordinates	51.4173 , -0.6922
Survey type	Full. Based on 93 days activity over Mid Dec to Mid Jan, whole of April and August
Assessment disruption band	REGULAR
Assessment actual value	9.11
Assessment description	Sound equates to a "B" road or busy "C" road i.e. regular traffic that will be noticeable at peak times which includes evenings and weekends. Location is on a secondary 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 4. Some of the flights will be below 7000 feet.
Band range	Lower: 7.0 --> Upper: 12.0
Flight holding stack identified?	No

Count of types of disruption
All flights below 26,000 feet	3 ✔
Flights below 20,000 feet	104 ✔
Flights between 7,000 and 12,000 feet	9 ✔
Flights below 7000 feet	6,850 ❌ (6,666)
4 or more flights per hour	345 ✔
9 or more flights per hour	42 ✔
Departures between 1,500 and 15,000 feet	2,000 ❌ (1,050)

Average occurances
Time in seconds an aircraft existed in the Airspace Bubble	15 ✔
Altitude for all flights	22,995 ✔
Altitude of departures between 1,500 and 15,000 feet	7,869 ❌ (8,708)
Altitude of flights below 20,000 feet	9,780 ✔
Number of disruptions per day	24 ✔
Percentage of disruptions that occur Out-Of-Hours and at Weekends	40 ✔
Distance from baseline in miles	0.68

Scale of regular disruption (0 - low, 25+ high)	Period and Frequency
6.38	Monday @ 19:00 - 8 time(s) in 13 weeks. Approx:4 flight events.
11.43	Monday @ 17:00 - 7 time(s) in 13 weeks. Approx:7 flight events.
10.86	Saturday @ 11:00 - 7 time(s) in 13 weeks. Approx:7 flight events.
9.43	Monday @ 14:00 - 7 time(s) in 13 weeks. Approx:6 flight events.
9.29	Saturday @ 13:00 - 7 time(s) in 13 weeks. Approx:5 flight events.
8.86	Saturday @ 16:00 - 7 time(s) in 13 weeks. Approx:5 flight events.
7.93	Monday @ 10:00 - 7 time(s) in 13 weeks. Approx:5 flight events.
5.57	Monday @ 7:00 - 7 time(s) in 13 weeks. Approx:4 flight events.
5.50	Saturday @ 18:00 - 7 time(s) in 13 weeks. Approx:4 flight events.