NCEP maintains a WWW page for this data set. This data set was developed by John Janowiak and Pingping Xie, and is intended for real-time climate monitoring (Janowiak and Xie 1999). The authors "strongly suggest" that users employ either the CMAP or GPCP data sets for analyses that do not require real-time data or which would benefit from more strongly quality controlled data. I will update this file on occasions when I need more recent data.
All errors in the netCDF files are due to Todd Mitchell.
At JISAO the files can be found at /home/disk/muggy/data/merged_precip/cams-opi/
monthly rain rate (mm/day)
monthly rainfall amount (cm/mon)
1979-99 climatological rainfall amounts
Janowiak, J. E., and P. Xie, 1999: CAMS-OPI: A global satellite-rain gauge merged product for real-time precipitation monitoring applications. J. Climate, 12, 3335-3342.
Todd Mitchell ( email@example.com ) JISAO data