Hello All,
 
I have divided India into 31 parts like 20-23N & 90-93E so on... I need pricipitation (tpr) over all 31 parts.
Below are the log that I am using on grads to find out precipitation for all 31 parts.
After wrinting this command we got 240 value and then I sum the all 240 value to get monthly precipitation value.
 
ga-> open SRF.2009090100.ctl
Scanning description file:  SRF.2009090100.ctl
Data file SRF.2009090100 is open as file 1
LON set to 49.4242 111.019
LAT set to -10.48 39.77
LEV set to 1008.43 1008.43
Time values set: 2009:9:1:3 2009:9:1:3
E set to 1 1
ga-> set t 1 240
Time values set: 2009:9:1:3 2009:10:1:0
ga-> d tloop(aave(tpr,lon=90,lon=93,lat=20,lat=23))
 
Here my question is , whether I am using right path to calculate the precipitation value.
 
Please reply as soon as possible
  
 
--
Rajesh Kumar Maurya
M.Sc(Tech)- Geophysics(Meteorology); Junior Research Fellow & Research Scholar
Department of Geophysics
Banaras Hindu University
Varanasi 221005