There is a software package called "RadEst" which estimates the daily total
radiation using Tmax and Tmin available at
http://www.sipeaa.it/ASP/ASP2/index_tools.asp .

  Also depending upon the time period for which you need solar radiation
data,  the web site at  http://earth-www.larc.nasa.gov/solar/power/ (click
on the Sustainable Buildings or Agroclimatology links)  offers daily total
surface solar radiation derived from satellite observations, on a global
grid of 1 degree latitude by 1 degree longitude for the time period July
1983 - December 2004.


At 10:12 AM 2/8/2006, you wrote:
>Hi, everyone on the list,
>I've a couple of questions, but firstable i would like to thank to all the
>ppl who help me on my prior question related with some troubles on running
>DSSAT, G. Hoogenboom, J.I Lizaso and JW White.
>1.- Once we finished the simulation process, is it possible to derive an
>equation for the model to explain the yield ?
>2.- Is there any way to calculate the radiation value using only Tmx, Tmin
>and precipitation daily data ?
>
>T, i, A,
>
>MC Victor M Rodríguez Moreno
>Sensores Remotos y Sistemas de Información Geográfica
>INIFAP-CIRNOC-CEPAB
>Laboratorio Nacional de Modelaje y Sensores Remotos
>Campo Experimental Pabellón
>km 32.5 Carretera Ags-Zac CP 20660
>tel/fax (465) 958 01 61 y 67, Ext 132
>[log in to unmask]
>----- Original Message -----
>From: Victor M. Rodríguez M.
>To: [log in to unmask]
>Sent: Thursday, February 02, 2006 10:48 AM
>Subject: simulation troubles
>
>
>Hello everyone on the list i am almost newly on DSSAT son hopefully this
>won´t be a dump question. I m on a run to simulate maize yield and I
>followed all the route of DSSAT to load experimental data, crop management
>data, weather data and soil data. I established the simulation options to
>generate yield but my problem is that when I select the options in
>"weather" and "models" menu, on the window to select the experiments and
>simulation outputs, only appears weather.out. So in consequence the
>results are very unhopeful for me because i cannot see any yield
>simulation. What could be wrong ? any idea ?  Regards
>
>
>MC Victor M Rodríguez Moreno
>Sensores Remotos y Sistemas de Información Geográfica
>INIFAP-CIRNOC-CEPAB
>Laboratorio Nacional de Modelaje y Sensores Remotos
>Campo Experimental Pabellón
>km 32.5 Carretera Ags-Zac CP 20660
>tel/fax (465) 958 01 61 y 67, Ext 132
>[log in to unmask]

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