Recent progress on the active limb sounding of the earth with GPS signals. - Chi O. Ao; George Hajj; Byron A. Iijima; Anthony J. Mannucci; Thomas K. Meehan; Manuel de la Torre Juárez (IGARSS, 2005)

GPS Radio Occultation as Part of the Global Earth Observing System. - Anthony J. Mannucci; Chi O. Ao; Tom K. Meehan; Byron A. Iijima; Attila Komjathy; Thomas P. Yunck; Marc K. Pestana; Brian D. Wilson (IGARSS (1), 2008)