Magnetoquasistatic response of conducting and permeable prolate spheroid under axial excitation. - Henning Braunisch; Chi O. Ao; Kevin O'Neill; Jin Au Kong (IEEE Trans. Geosci. Remote. Sens., 2001)

Evaluation of approximate analytical solutions for EMI scattering from finite objects of different shapes and properties. - Irma Shamatava; Kevin O'Neill; Fridon Shubitidze; Keli Sun; Chi O. Ao (IGARSS, 2002)

Quasi-magnetostatic solution for a conducting and permeable spheroid with arbitrary excitation. - Chi O. Ao; Henning Braunisch; Kevin O'Neill; Jin Au Kong (IEEE Trans. Geosci. Remote. Sens., 2002)

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)

An interdisciplinary approach at studying the Earth-Sun system with GPS/GNSS and GPS-like signals. - Cinzia Zuffada; George Hajj; Anthony J. Mannucci; Yi Chao; Chi O. Ao; Jim Zumberge (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)

GPS, Occultation Systems. - Chi O. Ao (Encyclopedia of Remote Sensing, 2014)

Sensitivity of PAZ LEO Polarimetric GNSS Radio-Occultation Experiment to Precipitation Events. - Estel Cardellach; Sergio Tomás; Santi Oliveras; Ramon Padullés; Antonio Rius; Manuel de la Torre Juárez; Francis Joseph Turk; Chi O. Ao; E. Robert Kursinski; Bill Schreiner; Dave Ector; Lidia Cucurull (IEEE Trans. Geosci. Remote. Sens., 2015)

High-value remote sensing for the geosciences: Opportunistic use of navigation satellite signals. - Anthony J. Mannucci; Stephen T. Lowe; Jeffrey Dickson; Larry E. Young; Garth W. Franklin; Thomas K. Meehan; Stephan Esterhuizen; Chi O. Ao; Panagiotis Vergados; Clara C. Chew; Son V. Kim; Son V. Nghiem; et al. (IGARSS, 2017)

Polarimetric Gnss Radio-Occultations Aboard Paz: Commissioning Phase and Preliminary Results. - Estel Cardellach; Sergio Tomás; Antonio Rius; Chi O. Ao; M. de la Torre-Iuarez; Ramon Padullés; F. Joseph Turk; Bill Schreiner (IGARSS, 2018)

Benefits of a Closely-Spaced Satellite Constellation of Atmospheric Polarimetric Radio Occultation Measurements. - F. Joseph Turk; Ramon Padullés; Chi O. Ao; Manuel de la Torre Juárez; Kuo-Nung Wang; Garth W. Franklin; Stephen T. Lowe; Svetla M. Hristova-Veleva; Eric J. Fetzer; Estel Cardellach; Yi-Hung Kuo; J. David Neelin (Remote. Sens., 2019)

GNSS-RO Refractivity Bias Correction Under Ducting Layer Using Surface-Reflection Signal. - Kuo-Nung Wang; Chi O. Ao; Manuel de la Torre Juárez (Remote. Sens., 2020)

Sensing Horizontally Oriented Frozen Particles With Polarimetric Radio Occultations Aboard PAZ: Validation Using GMI Coincident Observations and Cloudsat a Priori Information. - Ramon Padullés; Estel Cardellach; F. Joseph Turk; Chi O. Ao; Manuel de la Torre Juárez; Jie Gong; Dong L. Wu (IEEE Trans. Geosci. Remote. Sens., 2022)

Laboratory Measurements of L Band Oxygen Opacity Applicable to GNSS Remote Sensing. - Alex Akins; Brian Drouin; Paul G. Steffes; Anthony J. Mannucci; Chi O. Ao (IGARSS, 2024)