The Noise Limit at the Monitor is the Baseline Noise Limit + "Limit Adjustment" + "Calibration Allowance" (Print on 11x17 Landscape)
HEATHROW Day
0700-2300
Shoulder
0600-0700
2300-2330
Night
2330-0600
Runway Government reference NTK System Reference OS Coordinates
(10 meters)
Elevation Above Sea Level (m) Elevation Above Aerodrome (m) Latitude
N
Longitude
W
Distance From Brake Release
km
Limit Adjustment dBA Calibration Allowance Baseline Noise Limit  Noise Limit at Monitor Baseline Noise Limit Noise Limit at Monitor Baseline Noise Limit Noise Limit at Monitor Description
27L/R 6 6 TQ 0204 7510 18 -6 512756 0003157 6.58 -0.3 0.7 94.0 94.4 89.0 89.4 87.0 87.4 Thames Water, Wraysbury
A 19 TQ 0263 7700 20 -4 512857 0003124 6.25 2.3 0.7 94.0 97.0 89.0 92.0 87.0 90.0 Colnbrook
B 18 TQ 0278 7647 20 -4 512840 0003117 6.00 4.8 0.7 94.0 99.5 89.0 94.5 87.0 92.5 Poyle
C 17 TQ 0219 7566 18 -6 512814 0003148 6.58 -0.3 0.7 94.0 94.4 89.0 89.4 87.0 87.4 Horton
D 15 TQ 0197 7477 17 -7 512745 0003201 6.83 -0.6 0.7 94.0 94.1 89.0 89.1 87.0 87.1 Coppermill
E 14 TQ 0169 7409 17 -7 512724 0003216 7.20 -1.0 0.7 94.0 93.7 89.0 88.7 87.0 86.7 Wraysury Reservoir (South)
09R F 11 TQ 1151 7606 21 -3 512821 0002345 6.40 0.9 0.7 94.0 95.6 89.0 90.6 87.0 88.6 Hounslow West
G 12 TQ 1166 7560 21 -3 512806 0002338 6.50 -0.1 0.7 94.0 94.6 89.0 89.6 87.0 87.6 Barracks
H 10 TQ 1163 7495 21 -3 512745 0002340 6.37 1.2 0.7 94.0 95.9 89.0 90.9 87.0 88.9 Hounslow Heath
I 13 TQ 1164 7398 20 -4 512714 0002341 6.60 -0.3 0.7 94.0 94.4 89.0 89.4 87.0 87.4 East Feltham
SubGrid Easting Northing
Ordnance Survey (OS) Coordinates