Level 2 and Level 3 GPROG MHS Version V04A products, starting from February 01, 2014 are in production and will be available to our registered users at:
ftp://arthurhou.pps.eosdis.nasa.gov/

This data can also be ordered through PPS's STORM
https://storm-pps.gsfc.nasa.gov/storm/

To register with PPS to obtain data, please visit:
https://registration.pps.eosdis.nasa.gov/registration/

The DataType designation for these products are as follows:

 2AGPROFMETOPAMHS
 2AGPROFMETOPBMHS
 2AGPROFNOAA18MHS
 2AGPROFNOAA19MHS
 3GPROFMETOPAMHS_DAY
 3GPROFMETOPBMHS_DAY
 3GPROFNOAA18MHS_DAY
 3GPROFNOAA19MHS_DAY
 3GPROFMETOPAMHS
 3GPROFMETOPBMHS
 3GPROFNOAA18MHS
 3GPROFNOAA19MHS

These can be found in the ftp directory:
ftp://arthurhou.pps.eosdis.nasa.gov/gpmdata/yyyy/mm/dd/gprof

GPM GPROF (Level 2) Algorithm Theoretical Basis Documentation is available at:
https://pps.gsfc.nasa.gov/atbd.html
http://rain.atmos.colostate.edu/ATBD/

Please let us know if you have any questions, concerns or comments.