【摘要】 随着GPS/水准及全球重力测量的加密和扩展,获取高精度的似大地水准面或高程异常(ζ)已比较容易,如何进一步研究它和大地水准面或大地水准面高(N)之间的关系(即所谓间接的方法)使大地水准面得到精化,这就是本文的目的.文中对已推导的公式在模型作了验证,对如何利用地形等数据确定扰动重力垂直梯度也作了研究.结果表明:在海拔4000 m的高山地区,当似大地水准面的精度达到cm级时,大地水准面的精度也与之比较接近.更多还原

【Abstract】 In the wake of GPS /leveling and gravimetry have been densified and extended,to gaind the height anomaly(ζ) is relatively easy,so that it is the aim in this paper how to deduce the refined conversion from height anomalies to geoid undulations(N) and discuss the model tests of(N-ζ)formula.Determination of the vertical gradient of disturbed grarity is also made with topographic data.It shows that when the quasigeoid reaches cm leveling precision in mountain areas of elevation 4000 meters,the geoid also approximates high precision.更多还原