摘要
GPS测量具有观测速度快、相对精度高、全天候观测等优点,但在低纬度地区由于地表电离层电离子活动及基线长度的影响,GPS内业数据处理较为困难。本文分析了GPS数据处理中电离层延迟的影响和常见的几种电离层改正模型,并结合工程项目现场情况,探讨GPS观测数据在基线处理时计算频率和电离层模型的处理方法以及对测量成果的影响,本文结论对低纬度地区长大线状工程GPS数据处理具有一定的指导作用和参考价值。
GPS measurement method has the advantages of high observation speed, high relative accuracy, all-weather operation and so on. But at lower latitudes, due to the influence of the baseline length and the electric ion activity of the earth＇ s surface, it is relatively difficult to processing GPS data by using the software. This paper analyses the effects of ionospheric path delay in GPS data processing and several kinds of ionospheric correct models are considered. And combined with the practical conditions of the project, we discuss on frequency and ionospheric model used during the data processing of GPS baselines. At the same time, the influence of different processing methods on the obtianed results is analyzed. The results of this paper may offer guidance for the GPS data processing of long line engineering in the low latitude region.
出处
《工程勘察》
2018年第1期75-78,共4页
Geotechnical Investigation & Surveying
关键词
基线处理计算频率
电离层模型
baseline data processing frequency
ionospheric model
