中国陆海任意点垂线偏差的快速确定及精度分析

¹西安测绘信息技术总站,西安市西影路36号,710054;信息工程大学测绘学院,郑州市陇海中路66号450052;信息工程大学测绘学院,郑州市陇海中路66号450052

基金项目: 国家杰出青年科学基金资助项目 (4 0 12 5 0 13 )

详细信息

Fast Determination of the Vertical Deflection and Its Precision Analysis of Any Point on the Land and Sea in China

¹ Xi’an Technical Division of Surveying and Mapping,36 Xiying Road, Xi’an 710054,China) ² Institute of Surveying and Mapping,Information Engineering University,66 Middle Longhai Road,Zhengzhou 450052, China)

Funds: 国家杰出青年科学基金资助项目 (4 0 12 5 0 13 )

摘要: 采用全国14 89个高精度天文大地点作为外部精度检核点,对由1′×1′垂线偏差数字模型快速确定我国任意点垂线偏差的精度进行了估计。结果表明,我国垂线偏差子午和卯酉分量的精度:东部地区分别为±0 .94″和±0 .99″,西北地区分别为±1.71″和±1.2 8″,西南地区分别为±1.95″和±2 .0 0″。全国垂线偏差总体精度优于±1.5″。由1′×1′垂线偏差数字模型及相应软件确定任意点结果一般只需2s
- 垂线偏差 /
- 数字模型 /
- 快速确定 /
- 精度分析
Abstract: This paper states the methods for establishing a 1'×1' digital model of the vertical deflection and presents the data . The results of precision estimation in both the prime vertical component and the meridian component for this model achieved through adapting the 1 489 high\|accuracy astro\|geodetic points as check points are: ±0.94″ and ±0.99″ for the eastern region, respectively, ±1.71″ and ±1.28″ for the northwest region, respectively, ±1.95″ and ±2.00″ for the southwest region and the general precision for the whole country is better than ±1.5″. Generally, the determination of the vertical deflection on any point using the model and its corresponding software can be realized within 2 seconds.
- vertical deflection /
- digital model /
- fast determination /
- precision estimation