TOGA, a prototype for an optimal orbiting GNSS-R instrument

Remotely sensing the Earth's surface using GNSS (Global Navigation Satellite System) signals as bi-static radar sources is one of the most challenging applications for radiometric instrument design. As part of NASA's Instrument Incubator Program, our group at JPL is building a prototype in...

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Bibliographic Details
Published in:	2007 IEEE International Geoscience and Remote Sensing Symposium pp. 5109 - 5112
Main Authors:	Meehan, T.K., Esterhuizen, S., Franklin, G.W., Lowe, S., Munson, T.N., Robison, D., Spitzmesser, D.J., Tien, J.Y.T., Young, L.E.
Format:	Conference Proceeding
Language:	English
Published:	IEEE 01-07-2007
Subjects:	Bi-static radar BlackJack GPS Earth Galileo Global Positioning System GNSS-R Instruments Optical reflection Prototypes Radar applications Radar remote sensing Satellite navigation systems Signal design Spaceborne radar TOGA
Online Access:	Get full text
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Summary:	Remotely sensing the Earth's surface using GNSS (Global Navigation Satellite System) signals as bi-static radar sources is one of the most challenging applications for radiometric instrument design. As part of NASA's Instrument Incubator Program, our group at JPL is building a prototype instrument, TOGA (Time-shifted, Orthometric, GNSS Array), to address a variety of GNSS science needs. Observing GNSS reflections is major focus of the design/development effort. The TOGA design features an electronically steered antenna (ESA) array which forms simultaneous high-gain beams in multiple directions. Multiple FPGAs provide flexible digital signal processing logic to process both GPS and Galileo reflections. A Linux operating system based science processor serves as experiment scheduler and data post-processor. This paper outlines the TOGA design approach as it applies specifically to observing science quality GNSS-R signals from low Earth orbit.
ISBN:	9781424412112 1424412110
ISSN:	2153-6996 2153-7003
DOI:	10.1109/IGARSS.2007.4424011