Validation of recent geopotential models in Tierra Del Fuego

被引:5
|
作者
Eugenia Gomez, Maria [1 ,2 ]
Perdomo, Raul [1 ,2 ]
Del Cogliano, Daniel [1 ,2 ]
机构
[1] Univ Nacl La Plata, Fac Ciencias Astronom & Geofis, La Plata, Argentina
[2] Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina
关键词
Global geopotential models; RTM data; Tierra del Fuego; GOCE; EGM2008; SPECTRAL EVALUATION; GRAVITY; GOCE; FAGNANO; LAKE;
D O I
10.1007/s11600-017-0085-y
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
This work presents a validation study of global geopotential models (GGM) in the region of Fagnano Lake, located in the southern Andes. This is an excellent area for this type of validation because it is surrounded by the Andes Mountains, and there is no terrestrial gravity or GNSS/levelling data. However, there are mean lake level (MLL) observations, and its surface is assumed to be almost equipotential. Furthermore, in this article, we propose improved geoid solutions through the Residual Terrain Modelling (RTM) approach. Using a global geopotential model, the results achieved allow us to conclude that it is possible to use this technique to extend an existing geoid model to those regions that lack any information (neither gravimetric nor GNSS/levelling observations). As GGMs have evolved, our results have improved progressively. While the validation of EGM2008 with MLL data shows a standard deviation of 35 cm, GOCO05C shows a deviation of 13 cm, similar to the results obtained on land.
引用
收藏
页码:931 / 943
页数:13
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