[gradsusr] imd data extraction

[RAMARAJU NAGARJUNA KUMAR]

sir,

i am  new user to Grads. I am learning. Now I have IMD pune grid data for temperature and riainfall. I want to extract for particular lan and lon and  want to store in Excel or in .txt file. Kindly help in writing seqence of commands how to write in that data . 
They given .ctl file.from that how to convert that into netcdf. then I can use in ArcGis.kindly advise how to use this data in ArcGIS.

Thanking you sir
R.Nagarjuna kumar
Scientist(C.A)