| 利用卫星轨迹交叉点标定CHAMP卫星加速度计数据 |
| |
| 引用本文： | 徐天河, 杨元喜. 利用卫星轨迹交叉点标定CHAMP卫星加速度计数据[J]. 武汉大学学报 ( 信息科学版), 2004, 29(11): 955-959. |
| |
| 作者姓名： | 徐天河 杨元喜 |
| |
| 作者单位： | 西安测绘研究所, 西安市雁塔路中段1号, 710054 |
| |
| 基金项目： | 国家杰出青年科学基金资助项目 ( 4 982 5 10 7)，国家自然科学基金资助项目 ( 4 0 2 740 0 2 ) |
| |
| 摘 要： | 基于能量守恒方程给出了利用卫星轨迹交叉点标定CHAMP卫星加速度数据的基本原理和方法,并给出了其严密的积分公式及其离散化形式。为了控制加速度数据的扰动异常,建议采用抗差估计求解参数值,并基于实测的CHAMP卫星加速度计数据进行了计算与比较,验证了该方法的有效性。
|
| 关 键 词： | 能量守恒 尺度因子 偏差参数 抗差估计 |
| 文章编号： | 1671-8860(2004)11-0955-05 |
| 收稿时间： | 2004-06-18 |
| 修稿时间： | 2004-06-18 |
Calibration for CHAMP Accelerometer Data Based on Crossover Points of the Satellite |
| |
| XU Tianhe, YANG Yuanxi. Calibration for CHAMP Accelerometer Data Based on Crossover Points of the Satellite[J]. Geomatics and Information Science of Wuhan University, 2004, 29(11): 955-959. |
| |
| Authors: | XU Tianhe YANG Yuanxi |
| |
| Affiliation: | Xi'an Research Institute of Surveying & Mapping, 1 Middle Yanta Road, Xi'an 710054, China |
| |
| Abstract: | The German Challeging Minisatellite Payload(CHAMP) was launched in July 2000. It is the first satellite that provides us with position and accelerometer measurements, with which the gravity field model can be determinated. One of the most popular method for geopotential recovery using the position and accelerometer measurements is the energy conservation method. The main aim of this paper is to determinate the scale and bias parameters of CHAMP accelerometer data using the energy conservation method. The basic principle and mathematical model using the crossover points of CHAMP orbit to calibrate the accelerometry data are given based on the energy balance method. The rigorous integral formula as well as its discrete form of the observational equation is presented. This method can be used to estimate only one of the scale and bias parameters or both of them. In order to control the influence of outliers, the robust estimator for the calibration parameters is given. |
| |
| Keywords: | energy conservation scale factor bias parameter robust estimation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《武汉大学学报(信息科学版)》浏览原始摘要信息 |
|
点击此处可从《武汉大学学报(信息科学版)》下载全文 |
