SC-3: Processing of Reflected and Occulted Global Navigation Satellite System (GNSS) Signals for Earth Remote Sensing

Monday 6 to Friday 10 July, 8:30 – 17:30

Presented by

Garrison, James L. (GNSS), Purdue University

Abstract

The course will cover introduction to the GNSS signal structure: Correlation properties of PRN codes; BPSK and BOC modulation; the Doppler effect; space to ground link budget; and the fundamentals of navigation receiver signal processing; Models for the reflected GNSS signal: Geometric optics-based models for rough surface scattering, their limitations, and current attempts to improve upon them; Geometry of the bistatic radar problem; Correlation properties of reflected signals and the generation of delay-Dopplermaps. Models for the polarization of reflected signals; Second-order moments ofthe reflected signal waveform as a stochastic process; Geophysical model functions; Retrieval of geophysical data through inversion of scattering models; Model for the radio-occultation of GNSS signals; Processing of radio-occultation signals and a review of current research and missions.

Further information about course content.

Speaker Biographies

Garrison, James L is an Associate Professor of Aeronautics and Astronautics at Purdue University, with a courtesy appointment in the School of Electrical and Computer Engineering. He also serves on the executive committee of the new Division of Environmental and Ecological Engineering at Purdue. He holds a PhD from the University of Colorado, Boulder, and degrees from Stanford and the Rensselaer Polytechnic Institute. He was at NASA’s Langley Research Center and Goddard Space Flight Center, from 1988 through 2000, prior to joining the Purdue faculty. He has published 19 journal articles, 34 conference papers, and has been awarded 2 US patents.