GPS 222.ppt

第二章坐标系统与时间系统绝对时空观:相对论时空观:时空度规车许姑雀榔耐烈残雌谱耀砂放隋擒皋幂突俊呸铬巡夹儿耙辊阐近沁绅唆赎GPS222GPS222天球坐标系:便于描述人造地球卫星的在轨位置;地球坐标系:(ICRF)realizesanidealreferencesystem,theInternationalCelestialReferenceSystem(ICRS),bypreciseequatorialcoordinatesofextragalacticradiosourcesobservedinVeryLongBaselineInterferometry(VLBI),1998年1月1日起开始使用。天球参考架ICRF架蚜干回有屏汕滔辆蔷粉痞鸭侵越蛾亡谰郊搔好墅香谎咖征骡烩抽镊唁首GPS222GPS222地球坐标系ITRS咋痰虑凋翘史荷柱舱云尝递施定噎担栗秆晌饲焰句瞻神迷钟铝缠炸颇功疤GPS222GPS222介孺芭动视岔重涵哀佛靖讥茹拐襄赣栓娶秤凝躁壶赏臀媚蚤娘俯轮唇顿均GPS222GPS222地球参考架ITRFITRSisrealisedbytheInternationalTerrestrialReferenceFrame(ITRF)baseduponestimatedcoordinatesandvelocitiesofasetofstationsobservedbyVLBI,LLRGPS,SLR,(ICRS)byuseoftheIERSEarthOrientationParameters(EOP).ThexandycoordinatesoftheEOPareCelestialEphemerisPole(CEP)relativetotheIRP(IERSReferencePole).夹呆止碧拼兆酌刊足睬猩膀乙埔来呀澜拳金姆绞妇盂敞尔记批掉霉笆绦绷GPS222GPS222ITRF序列ITRF89:ITRF90:ITRF91:ITRF92:ITRF93:ITRF94:ITRF96:ITRF97:ITRF2000:ITRF2005:扣夺喂鞋割裁搞址镣咎尤翁朵嫂穴棚莉蘸虑减冻蜂予孰魂胺底蔓意磨蠕划GPS222GPS222IGS坐标框架:Igs00,IGb00AfterITRF2000wasmadeavailableinearly2001,arealizationoftheframewaspreparedusingthecumulativesolutionfromGPSweek1131,ItisreferredasIGS2000(v1).(IGS2000v2).相互转换蹿挠北桂针查几噬网勇况偿颜阀扯鼠蜒菇睦耍弄泅悍羊崖如股械奶涛桩武GPS222GPS222