【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。更多还原

【Abstract】 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′×1.5′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 10km average distance.The model and ellipsoid height of GPS can apply to substituent four-grade and lower grade leveling observation.更多还原