极地研究

极地研究 ›› 2000, Vol. 12 ›› Issue (1): 10-17.

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利用地球重力场模型确定南极大地水准面

陈春明;李建成   

  • 出版日期:2000-03-30 发布日期:2000-03-30

DETERMINATION OF ANTARCTIC GEOID BY USING GLOBAL GRAVITY FIELD

  • Online:2000-03-30 Published:2000-03-30

PDF (PC)

1438

被引次数

13

摘要：

利用我国最新地球重力场模型 WDM94,给出了南极 (纬度范围为 - 60°～ - 90°)大地水准面高和平均空间重力异常。为了全面总结分析南极大地水准面特征 ,收集了国外最新地球重力场模型 OSU91 ( 360阶次 )和 JGMOSU( 360阶次 ) ,计算了相应的大地水准面高和平均重力异常。其结果分别与 WDM94的结果作了比较 ,WDM94与 OSU91和 JGMOSU的大地水准面高标准差分别为± 1 .90 m和± 2 .0 9m,平均空间重力异常标准差分别为± 8.97mgal和± 9.32 mgal

关键词: 南极;大地水准面;重力异常;地球重力场模型

Abstract:

With Chinese latest global gravity field model WDM94, the author provides the geoid height and mean free air gravity anomaly of Antarctic(The range of latitude is from -60° to -90°). In order to conclude and analyze the characters of Antarctic geoid roundly, the author collects overseas latest global gravity field model OSU91 (to degree and order 360) and JGMOSU (to degree and order 360), gets the corresponding geoid height and mean free air gravity anomaly. The result is compared with the result got from WDM94, thus we get the difference. The standard deviation of geoid height between WDM94 and OSU91 is ±1.90m;the deviation of geoid between WDM94 and JGMOSU is ±2.09m. The standard deviation of mean gravity anomaly are ±8.97mgal and ±9.32mgal respectively.