Grid Resolution: 0.07277 degrees lat/lon (8 km at the equator)
Domain: Global (60N - 60S)

The CPC Merged Microwave estimates are daily composites of all available passive microwave precipitation estimates from SSM/I, AMSU-B and TMI (TRMM). The estimates have been normalized to reduce the differences among them and thus to remove discontinuities in the maps. What distinguishes these estimates from "CMORPH" is that there is no propagation using IR data nor any morphing applied to these data. The microwave estimates are generated by NOAA/NESDIS and NASA/GSFC using the following published algorithms:

SSM/I: Ferraro, R. R., N. C. Grody and G. F. Marks, 1994: Effects of surface conditions on rain identification using the SSM/I. Remote Sensing Reviews, 11, 195-209.

TMI: Kummerow, C., Y. Hong, W.S. Olson, S. Yang, R.F. Adler, J. McCollum, R. Ferraro, G. Petty, D.B. Shin, and T.T. Wilheit, 2001: The evolution of the Goddard Profiling Algorithm (GPROF) for rainfall estimation from passive microwave sensors. J. Appl. Meteor., 40, 1801-1820.

AMSU-B: Weng, F.W., L. Zhao, R. Ferraro, G. Pre, X. Li and N.C. Grody, Advanced Microwave Sounding Unit (AMSU) cloud and precipitation algorithms, In Press, Radio Sci., 2003.