孙凤华, 吴晓平, 张传定. 中国陆海任意点垂线偏差的快速确定及精度分析[J]. 武汉大学学报 ( 信息科学版), 2005, 30(1): 42-46.
引用本文: 孙凤华, 吴晓平, 张传定. 中国陆海任意点垂线偏差的快速确定及精度分析[J]. 武汉大学学报 ( 信息科学版), 2005, 30(1): 42-46.
SUN Fenghua, WU Xiaoping, ZHANG Chuanding. Fast Determination of the Vertical Deflection and Its Precision Analysis of Any Point on the Land and Sea in China[J]. Geomatics and Information Science of Wuhan University, 2005, 30(1): 42-46.
Citation: SUN Fenghua, WU Xiaoping, ZHANG Chuanding. Fast Determination of the Vertical Deflection and Its Precision Analysis of Any Point on the Land and Sea in China[J]. Geomatics and Information Science of Wuhan University, 2005, 30(1): 42-46.

中国陆海任意点垂线偏差的快速确定及精度分析

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

  • 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

     

    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.

     

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