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Tropospheric path delay is an important error source in range measurements of many Earth observation systems. In this paper, the accuracies of 9 zenith hydrostatic delay (ZHD) and 18 zenith wet delay (ZWD) models are assessed using benchmark values derived from 10 years (2003–2012) of radiosonde data recorded at 92 stations in the China region. Our study confirms that ZHD can be well modeled with...
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