The following table shows the motion angles defined for the Heat DPRA method described in DPRA Heat stress report on page 107. These sun motion factors are represented by the heat model attribute sun daily motion and are used in the UHI-formula.
The following tables are included in the DPRA Heat stress report, in section B1.2.7, for corrections on the UHImax. The corrections are dependant on the times of sunrise and sunset.
Table 4, Sunrise and sunset times
| Period
|
Sunrise/sunset (in UTC)
|
| April 1st through april 2th
|
5/18
|
| April 13nd through april 20th
|
5/19
|
| April 20th through may 19th
|
4/19
|
| May 20th through may 25th
|
4/20
|
| May 26st through july 10th
|
3/20
|
| July 11th through july 30th
|
4/20
|
| July 31st through august 21st
|
4/19
|
| August 22nd through august 30th
|
5/19
|
| August 31st through september 24th
|
5/18
|
| September 25th through september 27th
|
5/17
|
| September 28th though september 30th
|
6/17
|
Table 5, Urban Heat Island factors for times of sunrise and sunset (in UTC)
| Sunrise/ sunset
|
6/17
|
5/17
|
5/18
|
5/19
|
4/19
|
4/20
|
3/20
|
| UTC 0
|
0.748
|
0.728
|
0.807
|
0.910
|
0.900
|
1.000
|
1.000
|
| 1
|
0.667
|
0.640
|
0.704
|
0.780
|
0.757
|
0.888
|
0.866
|
| 2
|
0.602
|
0.573
|
0.617
|
0.675
|
0.710
|
0.728
|
0.690
|
| 3
|
0.525
|
0.490
|
0.533
|
0.590
|
0.543
|
0.609
|
0.560
|
| 4
|
0.449
|
0.355
|
0.435
|
0.490
|
0.413
|
0.490
|
0.380
|
| 5
|
0.281
|
0.150
|
0.227
|
0.320
|
0.150
|
0.256
|
0.107
|
| 6
|
0.127
|
0.078
|
0.095
|
0.120
|
0.057
|
0.079
|
0.015
|
| 7
|
0.063
|
0.025
|
0.032
|
0.040
|
0.000
|
0.007
|
-0.020
|
| 8
|
0.019
|
-0.013
|
-0.009
|
-0.005
|
-0.020
|
-0.020
|
-0.007
|
| 9
|
-0.015
|
-0.020
|
-0.020
|
-0.020
|
-0.005
|
-0.006
|
0.007
|
| 10
|
-0.020
|
-0.001
|
-0.003
|
-0.004
|
0.013
|
0.010
|
0.029
|
| 11
|
0.000
|
0.025
|
0.020
|
0.016
|
0.037
|
0.033
|
0.050
|
| 12
|
0.030
|
0.056
|
0.048
|
0.042
|
0.063
|
0.056
|
0.074
|
| 13
|
0.065
|
0.090
|
0.080
|
0.071
|
0.090
|
0.082
|
0.108
|
| 14
|
0.117
|
0.165
|
0.136
|
0.111
|
0.150
|
0.128
|
0.161
|
| 15
|
0.205
|
0.270
|
0.215
|
0.176
|
0.222
|
0.184
|
0.228
|
| 16
|
0.335
|
0.413
|
0.325
|
0.270
|
0.318
|
0.270
|
0.312
|
| 17
|
0.532
|
0.600
|
0.485
|
0.386
|
0.450
|
0.366
|
0.424
|
| 18
|
0.747
|
0.803
|
0.662
|
0.546
|
0.600
|
0.506
|
0.556
|
| 19
|
0.906
|
0.920
|
0.849
|
0.716
|
0.762
|
0.651
|
0.695
|
| 20
|
0.975
|
0.978
|
0.932
|
0.877
|
0.890
|
0.803
|
0.838
|
| 21
|
1.000
|
1.000
|
0.979
|
0.941
|
0.950
|
0.901
|
0.911
|
| 22
|
0.931
|
0.925
|
1.000
|
0.981
|
0.982
|
0.958
|
0.964
|
| 23
|
0.849
|
0.830
|
0.918
|
1.000
|
1.000
|
0.983
|
0.984
|
See also