摘要
研究了联合重力场模型和地形系数模型直接计算大地水准面与似大地水准面差值的方法;分析了影响计算结果精度的误差源。提出利用实际地形数据SRTM3以及密度数据CRUST2.0改善计算结果的建议,并分别进行了比较。青藏高原地区的实际计算结果表明,该地区大地水准面与似大地水准面的差值均值约为0.8 m。
The method of combining EGM2008 gravity field model and topographic coefficients for geoid and quasigeoid transformation was studied,while the error was also analyzed. Compared with only topographic coefficients,it was suggested that SRTM3 and CRUST2.0 model could be used to make the result more precise. The result in Qinghai-Tibet Plateau showed that the average difference between geoid and quasigeoid of this area was about 0.8 m.
出处
《测绘科学技术学报》
CSCD
北大核心
2014年第1期18-22,共5页
Journal of Geomatics Science and Technology
基金
国家高技术研究发展专项经费资助(2013AA122502)
国家自然科学基金项目(41104047
41174026
41274029
41304022)
地球空间环境和大地测量教育部重点实验室开放基金(11-01-03)
