Introduction, overview, and status of the NPOESS aerosol polarimetry sensor (APS). - Vincent Grano; Shivadev K. Ubhayakar; John Mike Haas; Carl Schueler (IGARSS, 2003)

The Space Environment Sensor Suite for NPOESS. - Kenneth W. Eastman; Juan V. Rodriguez; James H. Eraker; Thomas E. Christensen; Shivadev K. Ubhayakar; William F. Denig (IGARSS, 2006)