摘要
我国现行的《区域重力调查规范》(DZ/T 0082-2006)和北美重力改正新标准采用纬度改正和高度改正对测点进行正常重力改正,Li和Gotze在1996年推导的正常重力公式能精确计算地球正常椭球体在空间任意点的正常重力值。对这3种方法进行对比分析,并计算了中国及其邻域地表的正常重力值。结果表明,中国区域重力调查规范中的正常重力改正方法与其他两种方法相比具有较大的误差,最大可达0.24×10-5m/s2。该误差不是系统差,而与地形起伏密切相关。
＂Standard of Regional Gravity Survey＂ of China and ＂New Standard of the North American Gravity Correction＂ adopt both height correction and altitude correction. Li and Gotze derived an exact formula for compu- ting the normal gravity values at any point in space. These three methods were compared by calculating the normal gravity values on the earth＇ s surface in China and its neighboring areas. The result indicates that the error calculat- ed using the method adopted by ＂Standard of Regional Gravity Survey＂ of China is larger than the others, and the maximum error reaches O. 24 x 10-s m/s2 The error is not a systematic one, it varies complexly, and closely relates to the terrain.
出处
《大地测量与地球动力学》
CSCD
北大核心
2014年第6期32-36,共5页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金项目(41074077)
高等学校博士学科点专项科研基金项目(20130132110023)
关键词
正常重力场
正常重力改正
高度改正
纬度改正
GRS80椭球体
normal gravity field
normal gravity correction
height correction
latitude correction
GRS80 ellipsoid
