At 06:26 PM 6/21/2004, Angel Lopez wrote:
Are there any functions available to calculate sunrise and sunset times for given latitude,longitude and dates?
If not, I'll appreciatte any pointers to C code I could use/port.
Thanks,
Angel
Hello, I have R code for determining solar elevation for given lat,lon,time - they were translated from the Javascript on these pages.
http://www.srrb.noaa.gov/highlights/sunrise/sunrise.html http://www.srrb.noaa.gov/highlights/sunrise/azel.html
I use them in a fairly specialized way, but I can dig it out and probably help you get started.
Cheers, Mike.
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Michael Sumner - PhD. candidate Maths and Physics (ACE CRC & IASOS) and Zoology (AWRU) University of Tasmania Private Bag 77, Hobart, Tas 7001, Australia Phone: 6226 1752
Overall, SAS is about 11 years behind R and S-Plus in statistical capabilities (last year it was
about 10 years behind) in my estimation.
-- Frank Harrell (SAS User, 1969-1991)
R-help (September 2003)
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