Linux Shell在电离层TEC格网数据提取和分析中的应用  

Application of Linux shell in ionospheric TEC grid data extraction and analysis

作　　者：李涌涛 李建文[2] 顾晨钟 陈晨[2] 张硕 车通宇 LI Yongtao;LI Jianwen;GU Chenzhong;CHEN Chen;ZHANG Shuo;CHE Tongyu(Xi’an Division of Surveying and Mapping,Xi’an 710054,China;Information Engineering University,Zhengzhou 450001,China;Xichang Satellite Launch Center,Xichang 615000,China)

机构地区：[1]西安测绘总站,陕西西安710054 [2]信息工程大学地理空间信息学院,河南郑州450001 [3]西昌卫星发射中心,四川西昌615000

出　　处：《全球定位系统》2019年第3期81-87,94,共8页Gnss World of China

摘　　要：电离层延迟误差是卫星导航和定位中不可忽略的重要误差,全球电离层总电子含量(TEC)格网数据因其将全球按规则的经纬度格网化,并给出了相应格网点的电离层TEC值,从而为用户使用提供了极大的便利.本文基于Linux Shell脚本编写简单、快速和容易维护等优点,利用Shell脚本对电离层TEC格网数据进行提取和分析处理,主要包括全球和自定义区域电离层TEC数据提取、均值计算、格网经纬度互差计算、最值提取等应用,可为基于全球电离层格网(GIM)数据对全球或区域电离层TEC周年变化、季节变化、周日变化规律以及时空变化特性等相关规律的分析研究提供一定的参考.The ionospheric delay is an important error source that cannot be ignored in satellite navigation and positioning.The global ionospheric TEC grid(GIM)data is very convenient to users because it provides TEC values at regular grid points globally.Based on the advantages of simplicity,high efficiency and easy maintenance of Linux Shell,this paper uses Linux Shell script to extract and analyze the ionospheric TEC grid data,including global and optional area ionospheric TEC data extraction,mean calculation,latitude and longitude grid difference calculation,and maximum and minimum value extraction.Therefore,some references could be provided for the analysis and research of annual,seasonal,weekly and daily variation characteristics,and some other temporal and spatial variation characteristics of global or regional ionospheric TEC based on GIM data.

关 键 词：LINUX SHELL 电离层格网 TEC GIM GMT 数据提取 

分 类 号：P352[天文地球—空间物理学]