重力位模型和GPS／水准数据确定区域似大地水准面  

Determination of regional quasi-geoid using gravity field models and GPS/leveling data

作　　者：黄腾[1] 宋雷[1] 方剑[2] 周旭华[2] 

机构地区：[1]河海大学土木工程学院,江苏南京210098 [2]中国科学院测量与地球物理研究所动力大地测量学重点实验室,湖北武汉430077

出　　处：《辽宁工程技术大学学报（自然科学版）》2008年第1期28-31,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(40674013);国家“863”计划基金资助项目(2006AA09Z153)

摘　　要：为了有效的利用GPS观测的高程信息,实现GPS观测值中的椭球高向正常高转化,采用EGM96和EIGEN-CG01C重力位模型和某区域的GPS/水准观测数据,应用几何方法确定了该区域1.5′×1.5′分辨率的似大地水准面格网数值模型。该似大地水准面模型内插高程异常与实测GPS/水准点的高程异常进行比较,内符合精度和外符合精度均优于0.040米。表明在地形平坦地区,用平均点间距为10KM的GPS/水准点成果,可以确定厘米级的似大地水准面模型,结合GPS观测成果可以取代四等及以下几何水准测量。In order to use the information of GPS observation and to translate ellipsoid height into normal height of observation point , A regional quasi-geoid model of 1.5＇×l.5＇distinguish rate is constructed with geometry method, using EGM96 and EIGEN-CG01 gravity field models and GPS/Leveling data. The height anomaly of quasi-geoid model is compared with GPS/Leveling height anomaly. The inner and outer accuracy of is less than 0.040m. This shows that the region quasi-geoid model of centimeter accuracy can be derived from geometry method in smooth region ,using GPS/leveling data of 10kin average distance. The model and ellipsoid height of GPS can apply to substituent four-grade and lower grade leveling observation.

关 键 词：重力位模型 GPS/水准 高程异常 似大地水准面 

分 类 号：P227[天文地球—大地测量学与测量工程]