摘要
由正常椭球的重力值随纬度变化的关系式导出了其反解形式,即由已知重力值来反求对应点的纬度,同时考虑采用线状航迹进行匹配来减少实际应用时存在的多解现象,其定位精度可以满足航海领域内的应用。由于正常椭球是以地球短半轴为旋转轴,经度方向是轴对称的,故该方法无法实现经度的解算,需要通过其他方式进行补充和完善。
Based on the expression between gravity and latitude calculated its inverse expression,by which one can calculate the corresponding latitude by given gravity value.Furthermore,it could be considered by matching the latitude with track on line to avoid the unwanted solution.The result shows that the precision is satisfied.This method can not calculate the longitude as it symmetrical around the short axis of normal ellipse,so there is much work to do to calculate the longitude.
出处
《计算机与数字工程》
2010年第8期190-191,207,共3页
Computer & Digital Engineering
基金
国家自然科学基金项目(编号:40904018)资助
关键词
重力场
匹配导航
正常椭球
卫星重力
gravity field
matching navigation
normal ellipse
satellite gravity
