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Sea level changes affect human living environments, particularly ocean coasts. The tide gauges (TG) can measure sea level change, while it is the relative variations with respect to the land. Recently, GPS-Reflectometry (GPS-R) has been demonstrated to measure sea level change as an altimetry. With the rapid development of China's BeiDou Navigation Satellite System (BDS), it may provide a new possible...
Snow plays a key role in water cycle, while snow monitoring has some limitations from traditional ground technique, e.g., low resolution and high costs. Recently it has been demonstrated to monitor snow depth by GPS multipath reflectometry (GPS-MR). However, most previous studies mainly used new L2C Signal-Noise-Ratio (SNR) data that are available after 2005, while some older GNSS receivers cannot...
In the past two decades, GNSS-R (Global Navigation Satellite System-Reflectometry) has been emerged as a new kind of microwave remote sensing technique. The reflected signals of the GNSS constellations and the direct ones form the typical bistatic or multi-static radar working mode. While, for one side, a new kind of special GNSS-R receivers should be developed to enhance the reflected signals. For...
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