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.
出处
《海洋测绘》
2006年第2期13-15,共3页
Hydrographic Surveying and Charting
关键词
三角高程测量
平差模型
大气改正
折光误差
trigonometric leveling
adjustment model
atmospheric correction
refraction error
