I have 20 binary files with .grd extension for rainfall (0.25 X 0.25 degree) that I downloaded from Indian Meteorological Department website from 2000 to 2020.
The data are arranged in 135×129 grid points. The first data in the record is at 6.5N & 66.5E, the second is at 6.5N & 66.75E, and so on. The last data record corresponds to 38.5N & 100.0E. The yearly data file consists of 365/366 records corresponding to non leap/ leap years.
I need to convert these files to text files using R. How do I read binary files with extension. grd in r and convert them to .txt and then merge all 20 files to form a single file?