Sun motion table (Heat Overlay): Difference between revisions

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The following table shows the motion angles defined for the Heat DPRA method described in {{Heat_DPRA_Report}} on page 107. These sun motion factors are represented by the heat model attribute [[Sun_daily_motion_(Heat_Overlay)|SUN_DAILY_MOTION]] and are used in the [[UHI_formula_(Heat_Overlay)|UHI-formula]].
The following table shows the motion angles defined for the Heat DPRA method described in {{Heat DPRA Report}} on page 107. These sun motion factors are represented by the heat model attribute [[Sun daily motion (Heat Overlay)|sun daily motion]] and are used in the [[UHI formula (Heat Overlay)|UHI-formula]].


<!--
The following tables are included in the {{Heat DPRA Report}}, in section B1.2.7, for corrections on the UHI<sub>max</sub>. The corrections are dependant on the times of sunrise and sunset.
{|class=wikitable
{|class=wikitable
|+Table 4, Sunrise and sunset times
!Period
!Period
!Sunrise/sunset (in UTC)
!Sunrise/sunset (in UTC)
|-
|-
| April 1st through april 19th
| April 1st through april 2th
| 5/18
| 5/18
|-
|-
Line 39: Line 40:
| 6/17
| 6/17
|}
|}
-->


[[File:Sun_motion_angles_(Heat_Overlay).png]]
{|class=wikitable
|+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==
{{article end
* [[Sun_daily_motion_(Heat_Overlay)|Sun daily motion]]
|notes=
* The daily motions, based on UTC, are calibrated for [[Project]]s in the Netherlands. Alternative daily motion values may be applicable for Projects elsewhere. One simple way to approximate a daily motion for a different location is to offset the provided values to the relevant timezone. For example: while the Netherlands is at UTC +02:00 (dependent on daylight savings time), and the relevant Project's location is at UTC +04:00, then for the Project, then rather than the value of 0.063 (12:00 for the 4/19 column), the value of 0.150 (14:00 for the 4:19 column) should be used instead.
|seealso=
* [[Sun daily motion (Heat Overlay)]]
}}

Latest revision as of 06:50, 14 April 2025

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

Notes

  • The daily motions, based on UTC, are calibrated for Projects in the Netherlands. Alternative daily motion values may be applicable for Projects elsewhere. One simple way to approximate a daily motion for a different location is to offset the provided values to the relevant timezone. For example: while the Netherlands is at UTC +02:00 (dependent on daylight savings time), and the relevant Project's location is at UTC +04:00, then for the Project, then rather than the value of 0.063 (12:00 for the 4/19 column), the value of 0.150 (14:00 for the 4:19 column) should be used instead.

See also

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