Fitting gravimetric geoid models to vertical deflections

被引：14
|
作者：
Featherstone, W. E. [1 ]
Lichti, D. D. [2 ]
机构：
[1] Curtin Univ Technol, Western Australian Ctr Geodesy, Inst Geosci Res, Perth, WA 6845, Australia
[2] Univ Calgary, Dept Geomat Engn, Ctr Bioengn Res & Educ, Schulich Sch Engn, Calgary, AB T2N 1N4, Canada
来源：
JOURNAL OF GEODESY | 2009年 / 83卷 / 06期
基金：
澳大利亚研究理事会;
关键词：
Gravimetric geoid errors; Vertical deflections; Vertical datum errors; AUSTRALIAN HEIGHT DATUM; COMBINED ADJUSTMENT; AUSGEOID98; SYSTEM; VALIDATION; ACCURACY;
D O I：
10.1007/s00190-008-0263-4
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Regional gravimetric geoid and quasigeoid models are now commonly fitted to GPS-levelling data, which simultaneously absorbs levelling, GPS and quasi/geoid errors due to their inseparability. We propose that independent vertical deflections are used instead, which are not affected by this inseparability problem. The formulation is set out for geoid slopes and changes in slopes. Application to 1,080 astrogeodetic deflections over Australia for the AUSGeoid98 model shows that it is feasible, but the poor quality of the historical astrogeodetic deflections led to some unrealistic values.
引用
收藏
页码：583 / 589
页数：7
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