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High-rate altimetry in SNR-based GNSS-R: Proof-of-concept of a synthetic vertical array
  • Mauricio Kenji Yamawaki ,
  • Felipe Geremia-Nievinski ,
  • João Francisco Monico
Mauricio Kenji Yamawaki
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Felipe Geremia-Nievinski
Federal University of Rio Grande do Sul

Corresponding Author:[email protected]

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João Francisco Monico
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Global Navigation Satellite System Reflectometry (GNSS-R) has emerged as a promising remote sensing technique for coastal sea level monitoring. The GNSS-R based on signal-to-noise ratio (SNR) observations employs a single antenna and a conventional receiver. It performs best for low elevation satellites, where direct and reflected radio waves are very similar in polarization and direction of arrival. One of the disadvantages of SNR-based GNSS-R for sea level altimetry is its low temporal resolution, which is of the order of one hour for each independent satellite pass. Here we present a proof-of-concept based on a synthetic vertical array. It exploits the mechanical movement of a single antenna at high rate (about 1 Hz). SNR observations can then be fit to a known modulation, of the order of the antenna sweeping rate. We demonstrate that centimetric altimetry precision can be achieved in a 5-minute session. [©2021 IEEE]
2022Published in IEEE Geoscience and Remote Sensing Letters volume 19 on pages 1-5. 10.1109/LGRS.2021.3068091