摘要
研究了利用EGM和DTM模型计算扰动重力梯度的原理和算法,并分别实现了利用EGM2008和SRTM3数据对扰动重力梯度的数值计算。通过比较地形数据与扰动重力梯度分量Tzz的相关性,验证了利用地形计算扰动重力梯度值的可靠性。讨论利用重力梯度辅助惯性导航的原理和方法,模拟一条航空轨迹,并对由加速度计产生的位置误差和由重力异常变化产生的位置误差进行对比分析,验证了重力梯度辅助惯性导航的必要性和可行性。
The principle The numerical of gravity gradient algorithm of gravity gradient calculated by EGM and DTM data are analyzed, and values are calculated by EGM2008 and SRTM3. Comparison of the correlation between DTM data and gravity gradient component verifies the reliability of gravity gradient data calculation by DTM data. The principle and methods of gravity gradient aided inertial navigation are discussed, and its necessity and practicability are also verified by comparing the position errors generated by accelerometer bias and gravity anomaly changes separately of a simulated trajectory results.
出处
《大地测量与地球动力学》
CSCD
北大核心
2014年第5期134-138,共5页
Journal of Geodesy and Geodynamics
基金
国家973计划项目(2012CB957703
2013CB733301)
国家自然科学基金项目(41074014
41274032)
