The Continuously Operating Reference Station (CORS) technique has been widely applied in land resource management, surveying, mapping, deformation monitoring, precise navigation, etc. This article analyzed the positioning method using EGM2008 and CORS of Jilin Province, China. The vertical transformation of EGM2008 from WGS84 to China’s CGCS2000 datum and the horizontal coordinate transformation from CGCS2000 to a triangulation coordinate system were discussed. The results indicated that a local geoid with respect to CGCS2000 can be transferred from EGM2008 with the same accuracy, and the geoid correction between CGCS2000 and WGS84 varied from 0.023 m to 0.111 m. The coordinate transformation method based on the curve surface approximation method indicated that the theoretical error was less than 0.09 m in the grid within 10° longitudinal and 5° latitudinal, and less than 0.3 m in large area and 0.1 m in small area in field validation. The method proposed in this article expanded the positioning result and its application for JLCORS and other CORS with local datum.
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机译：连续参考站（CORS）技术已广泛应用于土地资源管理，测绘，测绘，变形监测，精确导航等方面。本文利用吉林省的EGM2008和CORS对定位方法进行了分析。讨论了EGM2008从WGS84到中国CGCS2000基准面的垂直转换以及从CGCS2000到三角坐标系的水平坐标转换。结果表明，与CGCS2000有关的局部大地水准面可以以相同的精度从EGM2008转移，CGCS2000与WGS84之间的大地水准面校正范围为0.023 m至0.111 m。基于曲面近似法的坐标变换法表明，在10°纵向和5°纬度范围内，网格中的理论误差小于0.09 m，大范围内小于0.3 m，小范围内小于0.1 m 。本文提出的方法扩展了定位结果及其在具有局部基准的JLCORS和其他CORS中的应用。
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