测绘学报 ›› 2026, Vol. 55 ›› Issue (7): 1183-1198.doi: 10.11947/j.AGCS.2026.20250454

• 人工智能的大地测量与卫星重力反演前沿 • 上一篇    

顾及月光和周期性噪声影响的GOCE卫星姿态四元数校正方法

郭泽华1(), 徐新禹1,2(), 赵永奇1, 蔺文奇1, 丁嘉威1   

  1. 1.武汉大学测绘学院,湖北 武汉 430079
    2.武汉大学地球空间环境与大地测量教育部重点实验室,湖北 武汉 430079
  • 收稿日期:2025-10-27 修回日期:2026-06-18 发布日期:2026-08-18
  • 通讯作者: 徐新禹 E-mail:zehuaguo@whu.edu.cn;xyxu@sgg.whu.edu.cn
  • 作者简介:郭泽华(1992—),男,博士生,研究方向为重力卫星数据处理。 E-mail:zehuaguo@whu.edu.cn
  • 基金资助:
    国家自然科学基金(42388102; 42192533; 42574007; 42404005);中央高校自主科研项目(2042022dx0001)

A correction method for GOCE satellite attitude quaternions considering moonlight disturbance and orbit-periodic noise

Zehua Guo1(), Xinyu Xu1,2(), Yongqi Zhao1, Wenqi Lin1, Jiawei Ding1   

  1. 1.School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China
    2.Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 430079, China
  • Received:2025-10-27 Revised:2026-06-18 Published:2026-08-18
  • Contact: Xinyu Xu E-mail:zehuaguo@whu.edu.cn;xyxu@sgg.whu.edu.cn
  • About author:Guo Zehua (1992—), male, PhD candidate, majors in gravity satellite data processing. E-mail: zehuaguo@whu.edu.cn
  • Supported by:
    The National Natural Science Foundation of China(42388102; 42192533; 42574007; 42404005);Fundamental Research Funds for the Central Universities(2042022dx0001)

摘要:

地球重力场和海洋环流探测(GOCE)卫星星敏感器(STR)的姿态观测数据,为静电重力梯度仪(EGG)高精度重力梯度测量与解算提供基准。然而,该姿态数据受周期性月光干扰和轨道周期相关噪声影响,导致星敏感器视轴夹角残差(ΔIBA)中出现局部偏差和轨道周期成分。本文提出一种顾及上述影响的姿态数据校正方法。首先,采用估计温度效应的校正方法估计STR常数偏差与温度系数;并结合STR有效观测状态、卫星-月球矢量与STR视轴夹角识别月光干扰数据段;然后,以仍有效的主星敏感器为参考,采用Levenberg-Marquardt(LM)方法估计STR3在组合切换时段的局部校准参数,以减小ΔIBA的局部异常偏差;最后,基于ΔIBA估计轨道周期噪声项并归算至实测姿态数据。利用GOCE卫星2012年1月-6月的姿态数据验证表明,本文估计的STR间相对常数偏差和相对温度系数与ESA标定结果基本一致,两者最大差异分别为0.257″和0.04(″/℃);ΔIBA13与ΔIBA23周期均值异常出现的时间与卫星-月球矢量和相应STR视轴夹角小于14°的时段高度重合,并以约30天的周期出现。经LM局部校正后,ΔIBA13和ΔIBA23的周期均值分别降至3.95″和3.39″,标准差由0.87″和0.84″降低至0.44″和0.63″。去除轨道周期项后,角速度差值幅值谱密度(ASD)在1~30 CPR范围呈现与拟合阶数一致的谱峰。结果表明,本文方法可有效降低月光局部偏差和低频轨道周期误差的影响。

关键词: GOCE, 星敏感器, 参数估计, 周期性噪声, LM方法

Abstract:

The attitude observations acquired by the star trackers (STR) onboard the gravity field and steady state ocean circulation explorer (GOCE) satellite provide a reference for high-precision gravity gradient measurement and recovery using the electrostatic gravity gradiometer (EGG). However, these attitude data are affected by periodic moonlight interference and orbit-period-related noise, leading to local biases and orbit-periodic components in the inter-boresight angle residuals (ΔIBA) of the star trackers. This study proposes an attitude data correction method that simultaneously accounts for these effects. First, a correction method considering temperature effects is adopted to estimate the constant biases and temperature coefficients of the STRs; moonlight-contaminated data segments are then identified by combining the valid observation status of the STRs, the satellite-Moon vector, and the angle between this vector and the STR boresight. Then, the Levenberg-Marquardt (LM) method is used to minimize the sum of squared ΔIBA values and estimate local calibration parameters. Finally, orbit-periodic noise terms are estimated based on ΔIBA and reduced from the measured attitude data. Validation using GOCE attitude data from January to June 2012 shows that the estimated inter-STR relative constant biases and relative temperature coefficients are in good agreement with the ESA calibration results, with maximum discrepancies of 0.257″and 0.04″/℃, respectively. The times at which anomalies occur in the periodic mean values of ΔIBA13 and ΔIBA23 highly coincide with the periods when the angle between the satellite-Moon vector and the corresponding STR boresight is less than 14°, and recur with a period of approximately 30 days. After local correction using the LM algorithm, the periodic mean values of ΔIBA13 and ΔIBA23 are reduced to 3.95″and 3.39″, respectively, while their standard deviations decrease from 0.87″and 0.84″to 0.44″and 0.63″, respectively. After removing the orbit-periodic terms, the power spectral density (ASD) of the angular-rate differences exhibits spectral peaks consistent with the fitted orders over the range of 1~30 cycles per revolution (CPR). The results demonstrate that the proposed method can effectively reduce the effects of moonlight-induced local biases and low-frequency orbit-periodic errors.

Key words: GOCE, star sensor, parameter estimation, periodic noise, Levenberg-Marquardt method

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