Spaceborne GNSS-R Observation of Global Lake Level: First Results from the TechDemoSat-1 Mission
AbstractSpaceborne global navigation satellite system reflectometry (GNSS-R) data collected by the UK TechDemoSat-1 (TDS-1) satellite is applied to retrieve global lake levels for the first time. Lake levels of 351 global lakes (area greater than 500 km2 and elevation lower than 3000 m each) are estimated using TDS-1 Level 1b data over 2015–2017. Strong correlations (overall R2 greater than 0.95) are observed among lake levels derived from TDS-1 and other altimetry satellites such as CryoSat-2, Jason, and Envisat (the latter two are collected by Hydroweb), although with large root-mean-square error (RMSE) (tens of meters) mainly due to the fact that TDS-1 is not dedicated for altimetry measuring purpose. Examples of the Caspian Sea and the Poyang Lake show consistent spatial and temporal variations between TDS-1 and other data sources. The results in this paper provide supportive information for further application of GNSS-R constellations to measure altimetry of inland water bodies. View Full-Text
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Xu, L.; Wan, W.; Chen, X.; Zhu, S.; Liu, B.; Hong, Y. Spaceborne GNSS-R Observation of Global Lake Level: First Results from the TechDemoSat-1 Mission. Remote Sens. 2019, 11, 1438.
Xu L, Wan W, Chen X, Zhu S, Liu B, Hong Y. Spaceborne GNSS-R Observation of Global Lake Level: First Results from the TechDemoSat-1 Mission. Remote Sensing. 2019; 11(12):1438.Chicago/Turabian Style
Xu, Liwen; Wan, Wei; Chen, Xiuwan; Zhu, Siyu; Liu, Baojian; Hong, Yang. 2019. "Spaceborne GNSS-R Observation of Global Lake Level: First Results from the TechDemoSat-1 Mission." Remote Sens. 11, no. 12: 1438.
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