Quality analysis and precise orbit determination evaluation based on onboard GPS data

doi:10.13474/j.cnki.11-2246.2025.1029

Abstract

Abstract: HJ-2F is a new-generation small low earth orbit (LEO)synthetic aperture radar (SAR)remote sensing satellite developed by China, primarily designed for all-weather, all-day operational monitoring of ecological and environmental conditions.High-precision orbit determination is essential to ensure the quality and reliability of its remote sensing observations.This study analyzes onboard dual-frequency GPS observation data from HJ-2F acquired in January 2025.The observation quality is systematically evaluated in terms of satellite visibility, cycle slip rate, and measurement noise.A simplified dynamic model is then employed to conduct precise orbit determination (POD).The results demonstrate that the domestically developed onboard dual-frequency GPS receiver enables a radial orbit accuracy better than 1cm and a 3D orbit accuracy better than 3cm, meeting the requirements of high-precision remote sensing applications.

Key words: HJ-2F, GPS, low-orbit satellite, data quality analysis, precise orbit determination

CLC Number:

P228

SUN Yuqiang, PENG Lei, YUAN Xingming, PENG Zhengbin, SONG Chuanfeng. Quality analysis and precise orbit determination evaluation based on onboard GPS data[J]. Bulletin of Surveying and Mapping, 2025, 0(10): 175-179.

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