Sensing the Terrestrial and Atmospheric Hydrological Dynamic using Satellite Gravimeter and GNSS

Abstract Geodetic observation methods, e.g., satellite gravimeter and Global Navigation Satellite System (GNSS), are mainly used for determining the Earth’s gravity field reference system. However, many efforts have been made to adopt mentioned methods estimating hydrological dynamics. The of Gravity Recovery Climate Experiment its Following-On missions (GRACE/GRACE-FO) proven capture terrestrial variation. Also, thanks signal propagation through atmosphere medium, GNSS can be sensing hydrology variation in atmosphere, i.e., troposphere medium. This study aims explore GRACE/GRACE-FO observations estimate respective atmospheric Bandung, Indonesia. Monthly solutions provided by three agencies were We also continuous site ITB1 calculated series form precipitable water vapor. found that varies approximately ±20 cm, while vapor ranges between 1 5 centimeters. Further, we observed long-wavelength components from variations correspond dry wet seasons. only sensed shorter wavelength dynamic not GRACE as estimated monthly. At same time, delays every two hours using observations. Nevertheless, this shows potential uses geodetic approaches such dynamic.