Evaluation of the ZWD/ZTD Values Derived from MERRA-2 Global Reanalysis Products Using GNSS Observations and Radiosonde Data
Tropospheric delay is one of the main errors affecting high-precision Water Features positioning and navigation and is a key parameter of water vapor detection in the Global Navigation Satellite System (GNSS).The second Modern-Era Retrospective analysis for Research and Applications (MERRA-2) is the latest generation of reanalysis data collected by