全国天文大地网精度分析

Precision Analysis of Integrated Adjustment for Astro -geodetic Network

全国天文大地网与空间网联合平差二期工程已经完成，由此建立起来的坐标系也将投入使用。本文计算了全国参加联合平差的天文大地网点的精度，并按三角锁网布设的等级进行分析，结果表明：我国天文大地网平差结果可靠，内部精度优于0．3m、外符合精度优于0．5m.

The Integrated Adjustment for the astro - geodetic network and the GPS network has been accomplished, and a corresponding coordinate system has been established, too. In order to apply these results efficiently, the precision of coordinates calculated by the integrated adjustment is analyzed according to the grade of triangle net- work. The results show that the integrated adjustment method for the astro - geodetic network is reasonable and relia- ble, and that the inner and checking precision of coordinates is better than 0.3m and 0.5m respectively.