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Updated: Feb 8, 2026

Precision Measurements and Parametric Models of Vertebral Endplates
Published on: September 17, 2019
Decimeter-Level Geolocation Accuracy Updated by a Parametric Tropospheric Model with GF-3
Wentao Wang1,2,3, Jiayin Liu4,5, Xiaolan Qiu6,7
1School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 101408, China. wangwentao16@mails.ucas.ac.cn.
Abstract:
GaoFen-3 (GF-3) is a multi-polarization C-band synthetic aperture radar (SAR) satellite in China with a resolution of up to 1 m. Up to now, the geolocation accuracy of GF-3 could be improved to 3 m. According to the current study, there still exist meter-level geolocation residuals caused by atmospheric path delay after compensating with a static tropospheric model. In this paper, we compensate the residuals with the sophisticated tropospheric model based on real meteorological data. The experimental results show that the tropospheric model has an accuracy on the millimeter level, which can increase GF-3’s geolocation accuracy to several decimeters compared with the static tropospheric model.
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