SOLAR ELEVATION AND AZIMUTH ANGLES

For the 2006 winter solstice at For San Francisco, CA

Latitude 37 degrees, 46 minutes / Longitude 122 degrees, 25 minutes

December

Elevation at Noon

 

Sun Rise Azimuth

   

Sun Set Azimuth

 
 

Degree

Min

Delta  

Hr:Min:Sec

Degree

Min

Delta  

Hr:Min:Sec

Degree

Min

Delta

18

28

50.4

   

07:21:20

119

38.4

   

16:51:26

240

19.8

 

19

28

48.6

-1.8  

07:21:55

119

40.2

+1.6  

16:51:50

240

18.6

-1.2

20

28

48.0

-0.6  

07:22:28

119

41.4

+1.2  

16:52:20

240

18.0

-0.6

21

28

47.4

-0.6  

07:22:58

119

42.0

+0.8  

16:52:47

240

17.4

-0.6

22

28

47.1

-0.3  

07:23:30

119

42.0

0.0  

16:53:20

240

18.0

+0.6

23

28

47.4

+0.3  

07:23:55

119

41.4

-0.6  

16:53:49

240

18.6

+0.6

24

28

48.6

+0.2  

07:24:20

119

39.6

-0.8  

16:54:24

240

19.8

+1.2

25

28

49.8

+0.2  

07:24:45

119

37.8

-1.8  

16:55:00

240

22.2

+2.4
Elevation = angular degrees/minutes above the horizon at 12:00 noon.
Azimuth = the angular degrees/minutes from North measured in a clockwise direction.
Note that the exact time of the solstice is at 22 minutes after mid-night on the morning of December 22, Grenwich Mean Time. This is 4:22 pm December 21 in San Francisco time. This exact time is closer to the sunrise in San Francisco on December 22 than it is to the sunrise in San Francisco on December 21, causing the solstice as determined by the sun rise to appear to occur on the 22nd rather than the 21st. However, the sunrise date shows that it could be either day, which is well within the accuracy of the data. The sunset data, where the time of sunset is very close to the actual time of the solstice does show the solstice to occur on the 21st. The elevation at noon data shows the solstice occuring on the 22nd, since the time from the actual time to noon on the 22nd is less than the time to noon on the 21st.

(Data courtesy of the National Oceanic and Atmospheric Solar Position Calculator.)