摘要
GPS水准大地水准面与重力大地水准面之差不仅由基准不同引起,而且也包含重力与GPS水准观测值的误差。建立了这两个水准面之差与基准转换参数、重力和GPS水准观测值的残差之间的关系,并基于最小二乘准则解算了基准转换参数和重力与GPS水准观测值的残差,即计算转换参数及重力与GPS观测值的改正。尤其当GPS水准精度远高于重力水准面时,联合解算模型可固定GPS水准大地水准面,只对重力观测值进行改正。
The difference between GPS leveling and gravity geoid is causedlies in by not only the different datums that they refer to respectively,but also the errors inevitably contained in the gravity and GPS leveling observations.The relationship between the transformation parameters of datums and the difference of these two observation technologies is established,and the parameters and residuals are calculated based on the least-square criterion.When GPS leveling data is more accuracy than gravity data,the geoid can be determined easily by this joint solution model,only considering the errors of gravity observations.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2011年第5期621-624,共4页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(40874013
90814009
40704005)
