[gradsusr] Back Trajectories

[Dr.Gamal El Afandi]

Hi everybody,
 
I was able to use Grads to calculate and plot back-trajectories but there are 
some limitations related to that script (I can open just one file for each 
calculation) I need to think about. The main issue is that each WRF file 
contains only part of the daily values simulated for Indiana we need to get 24 
hours back trajectories because the WRF output is in UTC.  Therefore in order to 
calculate 24 hours back trajectories I would need to open simultaneously 
multiple files and in some way change the code (if it is possible to manage this 
issue) in order to get all the values and make Grads computing the trajectories. 
My main concern is that once I open 2 files I will have exactly the same 
variable names so I don't know if it is possible within that code to refer to a 
specific value/variable and compute our trajectories correctly.
please let me know if you have any suggestions, so that maybe I can try.

With my kind regards
Gamal
_____________________________________________________
Dr.Gamal Salah El Afandi,Senior Researcher.
Data to Insight Center of Pervasive Technology Institute
Indiana University Bloomington USA
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Al Azhar University 
Faculty of science at Cairo 
Department of Astronomy and Meteorology
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Cairo,Egypt
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