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Sensors 2018, 18(7), 2197; https://doi.org/10.3390/s18072197

Decimeter-Level Geolocation Accuracy Updated by a Parametric Tropospheric Model with GF-3

1,2,3
,
2,3,* and 2,3
1
School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 101408, China
2
Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
3
Key Laboratory of Technology in Geo-spatial Information Processing and Application System, Beijing 100190, China
*
Author to whom correspondence should be addressed.
Received: 22 May 2018 / Revised: 3 July 2018 / Accepted: 6 July 2018 / Published: 8 July 2018
(This article belongs to the Special Issue First Experiences with Chinese Gaofen-3 SAR Sensor)
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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. View Full-Text
Keywords: GF-3; SAR; geolocation accuracy; tropospheric model GF-3; SAR; geolocation accuracy; tropospheric model
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Wang, W.; Liu, J.; Qiu, X. Decimeter-Level Geolocation Accuracy Updated by a Parametric Tropospheric Model with GF-3. Sensors 2018, 18, 2197.

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