摘要
长沙市似大地水准面精化根据移去-恢复原理,以EIGEN03C地球重力场模型作为参考重力场,利用549个点重力数据,采用第二类Helmert凝集法完成重力似大地水准面的计算;然后利用球冠谐调和分析方法将110个GPS水准点与重力似大地水准面联合求解得出2'!2'格网似大地水准面精化模型,其精度达到±8.0 mm,与36个C级GPS检核点比较,其差值的标准差为±9.7mm,优于设计要求。
The Changsha quasi-geoid refinement model is established by using remove-restore method .The gravi-metric quasi-geoid is calculated by utilizing the second category Helmert agglutination method ,basing on the EIGEN03C earth gravity field model and 549 point of gravity data .Then,through seperical cap harmonic analysis ,the 2′＆#215;2′grid qua-si-geoid refinement model is solved by uniting 110 GPS leveling and gravimetric quasi-geoid.Compared to 36 GPS C check benchmarks ,their standard deviation is ＆#177;9.7mm.The Changsha quasi-geoid refinement model accuracy reaches ＆#177; 0.008 m and superior to the design requirements .
出处
《城市勘测》
2014年第1期113-116,共4页
Urban Geotechnical Investigation & Surveying
