Abstract:The duration of satellite low elevation angle is shorter within one day, using the same satellite’s multipath SNR to detect soil moisture results in lower temporal resolutions. In order to ensure the reliability and accuracy of soil moisture inversion results and improve their temporal resolution, in this paper, considering the approximate range of effective altitude angles, we propose a high time resolution soil moisture inversion method based on multiple GPS satellite combinations for GPS-MR. The results show that the delayed phase combination can better characterize the change trend of soil moisture. Furthermore, the correlation coefficient between delayed phase combination and soil moisture is better than 0.92. In addition, the time resolution of multi-satellite combination improves greatly, from 1 day to 2 hours.