天文经纬度

本文对区域GPS网与地面网3维联合平差方法进行了研究，给出了相应的函数模型，解决了经典3维平差中天文经纬度缺乏和垂直折光差改正两个关键技术问题。

The paper studies the method of three dimensional combined adjustment of regional GPS and terrestrial networks , presents the corresponding functional models , and solves two key problems about the lack of astronomical latitudes and longitudes and the vertical refraction correction in the classical three dimensional adjustment .

固体潮对天文经纬度的影响

The Effect of Earth Tide on Astronomical Latitude and Longitude

天文定向是测定天文经纬度前不可缺少的一项工作，对其有着直接的影响，如定向不准确，则以后的工作无法完成。

Astronomy orientation is an indispensable work before measuring astronomical longitude and altitude , and it influences measurement directly .

新天文常数、系统对天文经纬度和方位角的影响

The Effect of New Astronomical Constants and System on Astronomical Latitude and Longitude and Azimuth