IMERG

Integrated Multi-satellite Retrievals for GPM.  This algorithm intercalibrates, merges and interpolates “all” satellite passive microwave precipitation estimates, together with microwave-calibrated infrared (IR) satellite estimates, monthly precipitation gauge analyses, and potentially other precipitation estimators at fine time and space scales for the TRMM and GPM eras over the entire globe.  Learn more at: http://pmm.nasa.gov/sites/default/files/document_files/IMERG_ATBD_V4.5.pdf