一种有效的区域似大地水准面精度检测方法

利用大地水准面逼近严密理论Molodenskii级数解,结合GPS、水准、重力和地形资料精化区域似大地水准面,其精度已从分米级向厘米级、高分辨率方向发展。如何客观、高效地评价区域似大地水准面精度是本文研究的主要目的。作者以广西似大地水准面精度检测为例子,给出了一种综合考虑GPS/水准检测点GPS大地高和水准测量误差的区域似大地水准面精度检测方法。利用覆盖广西境内的446个C级GPS控制网和航控GPS控制网GPS/水准检测点,点间距约25km,采用加权平均法计算广西似大地水准面外符合检测精度为±0.041m。

An effective method of region quasi geoid precision examination

Combining with GPS,leveling,gravity and terrain data,Molodenskii's series solution is used to determine the region quasi geoid,and the accuracy of region quasi geoid has developed from the decimeter level to the centimeter level precision and high resolution.The main purpose of this paper is to objectively and effectively inspect the accuracy of region quasi geoid.The author gives an effective precision examination method of region quasi geoid in overall evaluation the measuring error of GPS leveling checking points by taking GuangXi quasi geoid for example.446 GPS leveling checking points of c order GPS network and air surveying GPS network,distributed over Guangxi and with the spacing about 25 km,are utilized to inspect GuangXi quasi geoid adopting weighted mean method.The accuracy of external checking is 0.041 meter.