摘要
现阶段国内较为常用的似大地水准面精化模型实现高程拟合都需要点位的大地经纬度和水准高程信息,而在重力场研究领域则需要点位的地心坐标信息。通过设计实验对三种获得地心坐标的方法进行比较,并分析结果:大地水准面模型法的转换精度最高,前提是需要转换区域的大地水准面数值模型;两步法的转换精度较大地水准面模型法略低,但与其转换精度非常接近;一步法的精度最低。
At present,the precision model of quasi-geoid commonly used in China needs the geodetic latitude and horizontal elevation information of point position to realize height fitting,while the geocentric coordinate information of point position is needed in the field of gravity field research.This article compares three methods of obtaining the geocentric coordinate through the design experiment.The results show that the conversion accuracy of the geoid model method is the highest,but the premise is that the numerical model of the geoid in the converted area is needed,and the conversion accuracy of the two-step method is slightly lower than that of the geoid model method,but it is very close to the conversion accuracy of the two-step method.One-step method has the lowest precision.
作者
袁曼飞
YUAN Manfei(Shaanxi Railway Institute,Weinan Shaanxi 714099,China)
出处
《北京测绘》
2019年第11期1337-1339,共3页
Beijing Surveying and Mapping
基金
2017地理信息工程国家重点实验室开放基金(SKLGIE2017-M-3-3)
陕西铁路工程职业技术学院自科学基金(KY2019-14)
关键词
重力资料
大地纬度
水准高程
地心纬度
空间异常
gravity observations
geodetic latitude
height above sea level
geocentric latitude
free-air gravity anomaly
作者简介
袁曼飞(1988-),女,河南登封人,硕士,讲师,从事测绘工程的教学与科研工作,E-mail:378487053@qq.com。
