The South African Geoid 2010 : SAGEOID 10 by

The South African Geoid 2010 : SAGEOID 10 by
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南非大地水准面 2010:SAGEOID 10

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发表时间:
2010
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通讯作者:
G. Chandler
G. Chandler
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作者:
G. Chandler

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GPS(和其他GNSS系统)提供完整的三维位置--纬度、经度和高度。使用的参照面是WGS84椭球体,高度是该表面以上的高度-椭球体高度。然而,需要的高度类型是高于大地水准面的高度,这与平均海平面(MSL)密切对应。这两种类型的高度之间的差异在空间上是不同的(可以达到120米),相当于大地水准面和椭球体之间的分离-大地水准面高度。
GPS (and other GNSS systems) provide fully three-dimensional positions – latitude, longitude and height. The reference surface used is the WGS84 ellipsoid, and heights are heights above this surface – ellipsoidal heights. However, the type of height that is needed is a height above the geoid, which corresponds closely to mean sea level (MSL). The difference between these two types of heights varies spatially (it can reach 120 m) and is equivalent to the separation between the geoid and the ellipsoid – the geoidal height.