ITRF参考框架和历元对点位坐标的影响  

Influence of ITRF reference frame and epoch on point coordinates

作　　者：柴军兵 李永海[2] 胡志贵 何虎 李飞[1] CHAI Junbing;LI Yonghai;HU Zhigui;HE Hu;LI Fei

机构地区：[1]中国石油集团东方地球物理勘探有限责任公司装备服务处,河北涿州072750 [2]中国石油集团东方地球物理勘探有限责任公司国际勘探事业部,河北涿州072750

出　　处：《物探装备》2023年第2期83-87,共5页Equipment for Geophysical Prospecting

摘　　要：ITRF参考框架和历元历来是卫星大地测量研究的重要内容,随着星站差分的普遍应用,ITRF参考框架和历元在工程应用中也越来越多。参考框架和历元的不同,会引起同一点坐标的差异。为了进一步阐述参考框架和历元,本文首先阐述了地心地固坐标系、地球板块运动、板块漂移的速度场以及它们之间的关系,从而引出建立ITRF参考框架的目的以及框架间的转换方法;其次文章以实际算例说明了板块漂移速度对点位坐标的影响,全球板块漂移速度平均每年约3 cm,地球板块相接处漂移速度会变大;最后文章列举了美国喷气动力实验室、加拿大自然资源大地测量局和澳大利亚地球科学局GNSS数据处理结果的参考框架和历元,给出了星站差分、国家CORS、国家高精度GPS A级网和一些自建的盆地GPS控制网的参考框架和历元,为专业测量人员在国内外施工提供参考。ITRF(International Terrestrial Reference Frame)reference frame and epoch have always been an important part of satellite geodesy research.With the widespread application of satellite-station difference,ITRF reference frame and epoch are increasingly applied in engineering.The difference of frame of reference and epoch will cause the difference of coordinates of the same point.In order to further explain the reference frame and epoch,this paper first describes the earth-centered fixed coordinate system,the earth plate motion,plate drift velocity field and their relations,and then leads to the purpose of establishing the ITRF reference frame and the conversion method between frames.Secondly,the paper illustrates the influence of plate drift velocity on point coordinates with practical examples.The global plate drift velocity is about three centimeters per year on average,and the drift velocity will increase at the contact of the earth plates.Finally,the reference frames and calendars of GNSS data processing results of Jet Power Laboratory,Canadian Natural Resources Geodesy and Australian Geoscience are listed.The reference frames and calendars of satellite station difference,national CORS,national high precision GPS Class A network and some self-built basin GPS control networks are given.To provide reference for professional surveyors in construction at home and abroad.

关 键 词：ITRF参考框架 历元 框架转换 

分 类 号：P228[天文地球—大地测量学与测量工程]