Dear TN,

there is no simple relationship or factor between sunshine hour and
solar radiation.
Yet there are some empirical approaches. You might want to make yourself
familiar with the topic by reading for instance the respective chapters
in the FAO-56 paper.
http://www.fao.org/docrep/X0490E/x0490e00.htm#Contents

Best regards,
Rolf

==============================================
Dr. Rolf Sommer
International Center for Agricultural Research
in the Dry Areas (ICARDA)
P.O. Box 5466, Aleppo, Syria
Tel 00963 21 2213433
and
ZEF, Center for Development Research
Department of Ecology and Resource Management
University of Bonn
Walter-Flex-Str. 3
53113 Bonn Germany
Help save paper - do you really need to print this email?
==============================================


> -----Original Message-----
> From: DSSAT - Crop Models and Applications
> [mailto:[log in to unmask]] On Behalf Of T.N. Bhusal
> Sent: Tuesday, October 16, 2007 07:21
> To: [log in to unmask]
> Subject: problem with sunshine hour
>
> Hello DSSAT users
> I am working with DSSAT v 4.0.2.0 but i have encountered with tiny
> problem for conversion of sunshine hour to solar radiation (W/m2). I
> am unable to convert sunshine hour to solar radiation. If there is any
> relationship or factor for this please tell me. Any advise are highly
> appreciated.
>
> TN Bhusal
> student
> M.Sc.Ag (Agronomy)
> IAAS, Nepal