Analysis on geolocation error of FY-3D MERSI imaging

doi:10.16708/j.cnki.1000-758X.2022.0047

Abstract

Abstract: Accurate geolocation of Fengyun 3D（FY-3D）medium resolution spectral imager（MERSI）images improves the remote sensing performance.Given that the coastline of the images after geolocating generates a periodically oscillating error in this stage，the geolocation error was systemically analyzed based on the attitude and orbit control of satellites.Firstly，the FY-3D satellite′s dynamic model and the imaging model were established.Then，based on real images from the FY-3D/MERSI，the geolocation errors resulting from the attitude and orbit control subsystem were analyzed.Finally，the source of geolocation error was validated in numerical simulations by comparing the results with real images.The study indicates that onboard attitude and orbit propagation errors and payload mounting error of the attitude and orbit control subsystem can cause the deviation of the imaging reference，thereby leading to the periodically oscillating error of the images after geolocating.

Key words: FY-3D satellite, geolocation, periodic error, attitude and orbit control system, error analysis, payload mounting error

CLC Number:

TP79

HUANG Xuxing, YANG Yong, SHE Yuchen, JING Zhenhua, HU Xiuqing, GAO Xudong, LI Shuang. Analysis on geolocation error of FY-3D MERSI imaging[J]. Chinese Space Science and Technology, 2022, 42(4): 8-18.

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https://journal26.magtechjournal.com/kjkxjs/EN/Y2022/V42/I4/8

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Analysis on geolocation error of FY-3D MERSI imaging

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