首页> 外文学位 >The determination and error assessment of the Earth's gravity field model.
【24h】

The determination and error assessment of the Earth's gravity field model.

机译:地球重力场模型的确定和误差评估。

获取原文
获取原文并翻译 | 示例

摘要

Precision orbit determination methods, along with a new technique to compute relative data weights, have been applied to the determination of the Earth's gravity field and other geophysical parameters from the combination of satellite ground-based tracking data, satellite altimetry data, and the surface gravimetry data. The University of Texas Earth's gravity field model, TEG-2, was determined from data sets collected from fifteen satellites, spanning the inclination ranges from 15;Error assessment and calibration of the TEG-2 solution and formal error covariance have been performed. Observation residual combined with covariance prediction analysis indicate that a level of internal consistency has been achieved in the TEG-2 solution, and a calibration factor has been determined for the TEG-2 formal error covariance matrix so that the resulting covariance presents a realistic accuracy of TEG-2 solution.;The improvement of the TEG-2 geopotential solution presented in this investigation is due in large part to the optimal weighting technique applied to the simultaneous solution for the topography, the gravity field, and the satellite orbit. The accuracy of geographically correlated mean for Topex radial orbit predicted from the 36 x 36 part of the TEG-2 geopotential error covariance is about 11 cm, and the global accuracy of geoid undulation predicted from the 50 x 50 part of the TEG-2 geopotential error covariance is about 1.6 m.
机译:精确的轨道确定方法,以及一种计算相对数据权重的新技术,已被用于通过结合基于地面的卫星跟踪数据,基于卫星测高仪的数据和地表重力法来确定地球重力场和其他地球物理参数数据。得克萨斯大学地球重力场模型TEG-2是从15颗卫星收集的数据集中确定的,其倾斜范围从15开始;已经执行了TEG-2解决方案的误差评估和校准以及形式误差协方差。观测残差与协方差预测分析相结合表明,在TEG-2解决方案中已达到内部一致性水平,并且已为TEG-2形式误差协方差矩阵确定了校准因子,因此所得协方差呈现出实际的准确性。 TEG-2解决方案。本次调查中提出的TEG-2地势解决方案的改进,在很大程度上是由于将最佳加权技术应用于地形,重力场和卫星轨道的同时解决方案。根据TEG-2地势误差协方差的36 x 36部分预测的Topex径向轨道的地理相关平均精度约为11 cm,而根据TEG-2地势的50 x 50部分预测的大地水准面波动的整体精度误差协方差约为1.6 m。

著录项

  • 作者

    Yuan, Dah-Ning.;

  • 作者单位

    The University of Texas at Austin.;

  • 授予单位 The University of Texas at Austin.;
  • 学科 Engineering Aerospace.;Remote Sensing.;Geodesy.
  • 学位 Ph.D.
  • 年度 1991
  • 页码 448 p.
  • 总页数 448
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号