creating .ctl file and use

[Kanawade, V.P.]

Dear All,

I would like to plot 5 deg gridded Carbon monoxide (CO) over plotted wind vector.
For that I am using 'C' program to read ASCII CO data to produce binary file (.grd). I am not sure how to create *.ctl file and how to use in GrADS to plot CO values.

Please attached find the CO data file, C program which gives CO.grd file and manually created CO.ctl file (although I tried to create one but it gives error).

Any help with creating ctl file  and using it for plotting CO values in Grads would be much appreciated.
Thank you in adv..

best regards,
Vijay
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