An adjoint method based approach to data assimilation for a distributed parameter model for the ionosphere. - I. Gary Rosen; Color Wang; George Hajj; Xingcan Pi; Brian Wilson (CDC, 2001)

2D TSA-tree: A Wavelet-Based Approach to Improve the Efficiency of Multi-Level Spatial Data Mining. - Cyrus Shahabi; Seokkyung Chung; Maytham Safar; George Hajj (SSDBM, 2001)

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)

A GNSS-reflections simulator and its application to widelane observations. - Stephen T. Lowe; Julian Chaubell; George Hajj (IGARSS, 2007)

Assessing the Altimetric Measurement from CYGNSS Data. - Cinzia Zuffada; Bruce J. Haines; George Hajj; Zhijin Li; Stephen T. Lowe; Rashmi Shah; Jake Mashburn; Penina Axelrad; Andrew O'Brien 001; Paolo Cipollini; Valery U. Zavorotny; Alexander G. Voronovich (IGARSS, 2018)

Reservoir Water Level Monitoring Using CYGNSS's Level-1 Observations. - Nicholas J. Brendle; Steven Tsz K. Chan; George Hajj; Mohammad M. Al-Khaldi; Joel T. Johnson (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2024)

Near-Specular Interferometry With Signals of Opportunity Systems: Potential and Limitations. - Mohammad M. Al-Khaldi; Joel T. Johnson; Steven Tsz K. Chan; George Hajj (IEEE Trans. Geosci. Remote. Sens., 2025)