[gradsusr] Query Reg the Station data plotting and gridding

[Huddleston, John]

Geeta

Change your TDEF number to match the total number of time variations in your data file.

In the example you show only 06, so if you change TDEF to 1 it will work.

Go through your data file and find out how many different months you have in the file and change the number 5 on the TDEF line to the number of months in your file.

John Huddleston, PhD
Cooperative Institute for Research in the Atmosphere
________________________________
From: gradsusr-bounces at gradsusr.org [gradsusr-bounces at gradsusr.org] On Behalf Of Geeta Geeta [geeta124 at hotmail.com]
Sent: Monday, October 04, 2010 11:18 PM
To: grads grads
Subject: [gradsusr] Query Reg the Station data plotting and gridding

Dear All,
I need help "Reg the plotting of station Rainfall data from synoptic stations". I need to  do the following.
1. plot the STATION Rainfall using the Grads and then
2. I have to convert into the gridded rainfall using the Grads Oacres function.

Step 1.   As per the direction given in the Grads mannual, I have converted the Ascii data in the following format into the Binary using the following program (Attatched).
Format of Station rainfall
2010   06       qqq    34.3    85.5   123.3
2010   06       qrq    34.6    82.5   023.3
2010   06       qql    34.9    83.5   003.3
2010   06       qqm   35.3    84.5   000.3
2010   06       qqn    36.3    87.5   155.3
This data need to be converted to the format which GrADS understands. This is done by the Program test1.f (attatched). The ascii data is written into binary by this program.

Step 2. Then I have created the ctl file (stn.ctl) which looks like this.
dset ^rain.bin
dtype station
STNMAP  rain.map
undef -999.0
title rainfall
tdef 5 linear 12z18jan1980 12hr
vars 1
rf 0 99 rainfall
endvars

Step 3. When I try to plot the station data, I get the follwing message.
ga-> open stn.ctl
Scanning description file:  stn.ctl
Open Error:  Can't open Station/Index map file rain.map
  --> The invalid description file record is:
  --> stnmap  rain.map

  The data file was not opened.
ga->


So I feel that Unless I cannnot plot the station data properly, I cannot get the GRIDDED RAINFALL also USING the OACRES function.
Kindly Suggest how should I get the Gridded Rainfall from the Station data.
Thanks
geeta

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