| 数值模拟估算低低卫-卫跟踪观测技术反演地球重力场的空间分辨率 |
| |
| 引用本文： | 周旭华,吴斌,许厚泽,彭碧波.数值模拟估算低低卫-卫跟踪观测技术反演地球重力场的空间分辨率[J].地球物理学报,2005,48(2):282-287. |
| |
| 作者姓名： | 周旭华 吴斌 许厚泽 彭碧波 |
| |
| 作者单位： | 中国科学院测量与地球物理研究所，动力大地测量重点实验室，武汉430077 |
| |
| 基金项目： | 国家自然科学基金 (4 0 2 3 40 3 9)，中国科学院(KJCX2_SW_T1,KZCX3_SW_13 2 )，海洋“863”(2 0 0 2AA63 92 80 )项目资助 |
| |
| 摘 要： | 从两个方面模拟研究了低低卫-卫跟踪观测技术恢复地球重力场的空间分辨率. 利用重力位系数作为扰动量，积分30天的轨道，研究重力位系数变化引起低低卫-卫跟踪星间距离和速率变化，结果表明，对于地球重力场模型EGM96的前120阶，998%和97%的位系数扰动引起星间距离和速率变化的均方差大于1×１０-５m和１×１０-７m/s，并且星间距离观测值对地球重力场的反应更为敏感. 不考虑非保守力误差的影响，用随机误差为１×１０－５m和１×１０－６m/s的星间距离和速率变化作模拟观测量，恢复了78阶地球重力场位系数，结果表明，采用随机误差为１×１０－５m的星间距离恢复地球重力场的精度明显高于１×１０－６m/s的星间速率结果，但是如果考虑非保守力误差影响，则星间测速的优越性大大增强.
|
| 关 键 词： | 卫-卫跟踪 地球重力场 星间距离和速率变化 |
| 文章编号： | 0001-5733(2005)02-0282-06 |
| 收稿时间： | 2004-03-10 |
| 修稿时间： | 2004-12-13 |
Resolution estimation of Earth gravity field recovery through the low_low satellite to satellite technology by numerical simulation |
| |
| ZHOU Xu-Hua,WU Bin,XU Hou-Ze,PENG Bi-bo.Resolution estimation of Earth gravity field recovery through the low_low satellite to satellite technology by numerical simulation[J].Chinese Journal of Geophysics,2005,48(2):282-287. |
| |
| Authors: | ZHOU Xu-Hua WU Bin XU Hou-Ze PENG Bi-bo |
| |
| Institution: | Key Laboratory of Dynamic Geodesy, Institute of Geodesy & Geophysics, Chinese Academy of Sciences, Wuhan 430077, China |
| |
| Abstract: | In this paper, we used numerical simulation study the resolution of the Earth gravity field recovery through the low_low satellite to satellite tracking technology in two aspects. First, using geopotential coefficients as perturbation source, we studied the changes of SST range and range rate due to geopotential coefficient variation over 30_day integral orbit, the results showed that 998% and 97% of the geopotential coefficients produced perturbations with a root_mean_square larger than １×１０－５m and １×１０－７m/s on the range and range rate, which was based on the EGM96 gravity field truncated at degree and order 120, the effect of SST range on gravity field recovery was more sensitive than rang rate. Second, we added １×１０－６m/s SST range rate and １×１０－５m range random noise to the simulated observation, and recovered gravity field to degree and order 78 without considering the non_conservation force errors. The results showed that we could get higher precision of the gravity field coefficients by １×１０－５m range noise than １×１０－６m/s range rate noise, but considering the non_conservation force errors, the range rate would have more advantage over range. |
| |
| Keywords: | Satellite to satellite Earth’s gravity field Changes of range and range rate |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
