First spaceborne demonstration of BeiDou-3 signals for GNSS reflectometry from CYGNSS constellation |
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Institution: | 1. Institute of Space Sciences (ICE, CSIC), Barcelona 08193, Spain;2. Institut d''Estudis Espacials de Catalunya (IEEC), Barcelona 08034, Spain;3. Shanghai Spaceflight Institute of TT&C and Telecommunications, Shanghai 201109, China |
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Abstract: | The full constellation of Chinese Global Navigation Satellite System (GNSS) BeiDou-3 has been deployed completely and started fully operational service. In addition to providing global Positioning, Navigation and Timing (PNT) services, the BeiDou-3 satellites transmissions can also be used as the sources of illumination for Earth Observation (EO) with a bistatic radar configuration. This innovative EO concept, known as GNSS reflectometry (GNSS-R), allows to measure the Earth surface characteristics at high resolution via the reflected L-band radar signals collected by a constellation of small, low cost and low Earth orbiting satellites. For the first time in orbit, earth reflected BeiDou-3 signal has been detected from the limited sets of raw data collected by the NASA’s Cyclone GNSS (CYGNSS) constellation. The feasibility of spaceborne BeiDou-3 reflections on two typical applications, including sea surface wind and flooding inundation detection, has been demonstrated. The methodology and results give new strength to the prospect of new spaceborne GNSS-R instruments and missions, which can make multi-GNSS reflectometry observations available to better capture rapidly changing weather systems at better spatio-temporal scales. |
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Keywords: | Global Navigation Satellite System (GNSS) BeiDou-3 Small satellites Bistatic radar GNSS Reflectometry (GNSS-R) CYGNSS Tropical cyclone Flood inundation |
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