论VAM的适宜时间

On the suitable time for vertical angle measurement

垂直角观测(VAM)的质量与作业时间有关。通过对大气折光角及其起伏的日变化规律的分析,提出了一种根据动态照准误差确定VAM的有利与不利时间的方法。与传统的观点相比较,采用该法确定的适宜时间将具有更高的参考价值。

The quality of vertical angle measurement (VAM) relates to the operation time. Based on the analysis for the variation laws of the atmospheric refraction angle and its undulation in the daytime, a method to determine the favorable or unfavorable time for VAM on the basis of the dynamic sighting error is given in this paper. The suitable time determined by this way has higher reference value as compared with the time determined by traditional viewpoint.