Explanation:
Daily precipitation graphics are produced using the CPC MORPHing technique (CMORPH) on a global basis from 60^oN-60^oS. Data resolution is approximately 8km and the 24-hour product is a resultant accumulation of 30 minute segments. Data inputs include half-hourly geostationary satellite infrared temperature fields along with irregular-interval polar orbiting satellite microwave brightness temperature retrievals. The morphing process involves using the relatively poor temporal resolution microwave precipitation estimate data and interpolating its movement between retrieval periods.

For further information, see: http://www.cpc.ncep.noaa.gov/products/janowiak/cmorph.html