Use station data in GrADS:    details are found here, in the GrADS manual site.

To use station data in GrADS, we need to do the follwoings.

1. Make original data file with station informaiton
2. Make data file for GrADS
3. Make ctl file
4. Make map file for GrADS using [stnmap] command
5. Plot in GrADS