干旱区大气折光对三角高程测量精度的影响及分析  

Influence and Analysis of Refraction of Atmosphere to Trigonometric Leveling in Drought Area

作　　者：刘麦喜[1] 隋立芬[1] 王威[1] 

机构地区：[1]解放军信息工程大学测绘学院,河南郑州450052

出　　处：《海洋测绘》2006年第2期13-15,共3页Hydrographic Surveying and Charting

摘　　要：大气垂直折光是影响三角高程测量精度的主要因素,视线距离地面较高时,在有利观测时段进行垂直角观测(中午),并用传统的方法进行数据处理可有效减弱大气折光影响。而在沙漠戈壁滩等干旱环境下这两种条件难于实现。从数据处理的角度,结合某测区高程导线的观测数据探讨了减弱折光影响的一种改进的平差模型,与传统方法相比能取得较好效果。Vertical refraction of atmosphere is the main factors influencing the accuracy of trigonometric leveling. When aiming line is higher than surface of the earth, measuring vertical angle in advantageous session, and processing datum with orthodox method, we can weaken the influence of refraction efficiently. It is difficult to get the two conditions in the drought areas such as the Gobi desert, etc. This paper discusses one improved model of adjustment in the light of datum processing. It can get better result comparing with traditional method.

关 键 词：三角高程测量 平差模型 大气改正 折光误差 

分 类 号：P216[天文地球—测绘科学与技术]