Dear Sanjeev, You are absolutely right. This is SPARC data. It is in ascii format. But i would like to know the notions mentioned on each parameters of the file. I have also attached a text file here. you can see above. I would like to convert this into notions given in all the variables as 0.000123D+02. What is the mining of D+02 or D+05 etc. Also would like to convert the Lat long values in its original format as it contain the same notions.