David W. Draper, David A. Newell, Frank J. Wentz, Sergey Krimchansky, Gail M. Skofronick-Jackson: The Global Precipitation Measurement (GPM) Microwave Imager (GMI): Instrument Overview and Early On-Orbit Performance. IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens. 8(7): 3452-3462 (2015)