Calculating day length

Pedro J. Aphalo aphalo at
Thu Oct 5 09:28:11 EST 1995

Some weeks ago there was a query on how to calculate day length.
Yesterday I wrote a program that does exactly that, so I thought
that who posted that query (I no longer have his/her name) and
hopefully others may find it useful.

I have made available an executable for MS-DOS (80206 or better,
with coprocessor) and the C++ source code at the following URL:


 Pedro J. Aphalo
 University of Joensuu, Faculty of Forestry
 P.O. Box 111, FIN-80101 Joensuu, FINLAND
 e-mail: aphalo at
 fax: +358 73 151 4444 (or +358 73 151 3590)
 tel: +358 73 151 4406                      ,,,^..^,,,

More information about the Photosyn mailing list