| 陆海交界区域厘米级精度似大地水准面的确定 |
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| 作者单位： | 海军大连舰艇学院海测工程系 辽宁大连116018(金绍华，暴景阳，刘雁春，尤宝平)，92538部队 辽宁大连116041(孙刃) |
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| 摘 要： | 为了得到我国某陆海交界区厘米级精度的区域(似)大地水准面,利用43个高精度GPS/水准点和1 045个实测重力点数据对EGM96,WDM94和GFZ计算的局部重力(似)大地水准面进行了比较与评价。结果表明,在该测区用移去-恢复法确定重力(似)大地水准面时,EGM96应该是首选参考重力场模型。该测区处在陆海交界处,海域无GPS/水准数据。经比较发现,采用距离倒数加权平均法将该区重力似大地水准面拟合于GPS/水准数据比在大范围使用的多项式法效果更好。采用该方法计算的测区(似)大地水准面精度优于3cm。
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| 关 键 词： | 地球重力场模型 移去-恢复法 (似)大地水准面 GPS/水准 |
Determination of High Precision Quasi-geoid in Boundary of Land and Sea |
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| Authors: | JIN Shao-hua BAO Jing-yang LIU Yan-chun YOU Bao-ping SUN Ren |
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| Institution: | JIN Shao-hua1,BAO Jing-yang1,LIU Yan-chun1,YOU Bao-ping1,SUN Ren2 |
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| Abstract: | In order to get the determination of quasi-geoid at the boundary of land and sea,Quasi-geoid heights derived from these geo-potential models EGM96,WDM94 and GFZ were compared with the help of the 43 GPS/leveling observations and 1 045 observed gravity anomalies respectively.The results showed EGM96 was a preferred geo-potential model for determining the high precision geoid of this area by using remove-restore approach.Since there was no GPS/leveling data on the sea,the approach of distance weighted average was better at interpolating gravimetric geoid with GPS/leveling by comparing with the polynomials.The accuracy of quasi-geoid is higher by 3cm in this area. |
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| Keywords: | geo-potential models remove-restore technique quasi-geoid GPS/leveling |
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