Do you care about local topography/terrain? I think most of the calculators/tables that are commonly used assume that you are at a fairly flat place on the earth's surface, but that is not always true. The area where my wife grew up had its longest day closer to the equinox than the summer solstice and if I wanted to calculate the number of hours that direct sunlight would hit solar panels (which I don't have yet) on my house or the solar oven (which I do have) in my back yard, then assuming sunset and sunrise occurred at 90 degrees from vertical would definitely overestimate the time.
On Tue, Oct 23, 2012 at 1:45 PM, bambus <sonja_...@hotmail.com> wrote: > hi there, > does anyone know how to calculate the amount of daylight on every day of the > year in R? I mean the time between sunrise and sunset. > > thanks > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/daylight-tp4647213.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. -- Gregory (Greg) L. Snow Ph.D. 538...@gmail.com ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
