Function and Performance Assessment of a GNSS-R Receiver in Airborne Tests

Jyh-Ching Juang, Sheng-Hsiung Ma, Yung-Fu Tsai, Chen-Tsung Lin

Abstract:	The Global Navigation Satellite System Reflectometry (GNSS-R) is becoming a viable remote sensing technique for sea roughness, ocean wind, and soil moisture studies. The paper presents the analysis results of some recent flight tests of a GNSS-R receiver that is to be used in the spaceborne FORMOSAT-7R program. The omnipresence GNSS signals have not only provided high accuracy navigation but also encouraged several remote sensing missions such as FORMOSAT-7 and FORMOSAT-7R. In a GNSS reflectometry mission, the reflected signals are processed to form delay Doppler maps (DDMs) so that the properties including roughness, ocean wind speed, and soil moisture can be retrieved. Currently, GPS reflectometry missions are realized by Surrey TDS-1 and NASA CYGNSS in which the reflected GPS signals are processed. One distinguishable feature of the FORMOSAT-7R GNSS reflectometry mission is its capability to process both GPS, QZSS, and Galileo reflected signals. To verify the GNSS-R receiver capability and validate its performance, tests are deemed essential. In the paper, the airborne tests and data analyses of the GNSS-R receiver reported. The tests and analyses pave the way for the finalization of the flight model design of the FORMOSAT-7R GNSS-R payload.
Published in:	Proceedings of the ION 2019 Pacific PNT Meeting April 8 - 11, 2019 Hilton Waikiki Beach Honolulu, Hawaii
Pages:	641 - 645
Cite this article:	Juang, Jyh-Ching, Ma, Sheng-Hsiung, Tsai, Yung-Fu, Lin, Chen-Tsung, "Function and Performance Assessment of a GNSS-R Receiver in Airborne Tests," Proceedings of the ION 2019 Pacific PNT Meeting, Honolulu, Hawaii, April 2019, pp. 641-645. https://doi.org/10.33012/2019.16830
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