#3 Global
 
 
Terry A. Howell, Ph.D., P.E., D. WRE
Research Leader
USDA-ARS
P.O. Drawer 10 | 2300 Experiment Station Rd. (shipping)
Bushland, TX  79012-0010
(806) 356-5746 (voice)
(806) 356-5750 (fax)
[log in to unmask]
http://www.cprl.ars.usda.gov <http://www.cprl.ars.usda.gov/>  (internet)
P Please consider the environment before printing this e-mail.

________________________________

From: DSSAT - Crop Models and Applications on behalf of Automatic digest processor
Sent: Wed 9/17/2008 11:23 PM
To: Recipients of DSSAT digests
Subject: DSSAT Digest - 10 Sep 2008 to 17 Sep 2008 (#2008-72)



There is one message totalling 38 lines in this issue.

Topics of the day:

  1. Solar Radiation

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Date:    Wed, 17 Sep 2008 16:18:52 -0400
From:    Jordan Shockley <[log in to unmask]>
Subject: Solar Radiation

Dear DSSAT Members,

    I have access to daily solar radiation data but there are five
different types of radiation listed.  I was wondering if anyone knows
which type is appropriate for DSSAT.  The options are listed below
with a description.  Any information would be great.

1.) Extraterrestrial Horizontal Radiation -- Amount of solar radiation
in Wh/m2 received on a horizontal surface at the top of the atmosphere
2.) Extraterrestrial Direct Normal Radiation -- Amount of solar
radiation in Wh/m2 received on a surface normal to the sun at the top
of the atmosphere
3.) Global Horizontal Radiation -- Total amount of direct and diffuse
solar radiation in Wh/m2 received on a horizontal surface
4.) Direct Normal Radiation -- Amount of solar radiation in Wh/m2
received within a 5.7 degree field of view centered on the sun
5.) Diffuse Horizontal Radiation -- Amount of solar radiation in Wh/m2
received from the sky (excluding the solar disk) on a horizontal
surface

Thanks,
--
Jordan Shockley
University of Kentucky
Department of Agricultural Economics
331 C.E. Barnhart Building
Lexington, KY 40546-0276
Email: [log in to unmask]

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End of DSSAT Digest - 10 Sep 2008 to 17 Sep 2008 (#2008-72)
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