1、GNSS精密星历下载
地址:ftp://cddis.gsfc.nasa.gov/pub/gps/products/mgex
文件名称命名规则:tttwwwwd.sp3
ttt表示精密星历类型,有IGU, IGR, IGS, 也有gfz, wum, com, grm, qzf, tum等,IGMAS网长安chd,武大whu,上海台sha。
gbm是GeoForschungsZentrum Potsdam(GFZ)
+ 71 C01C02C03C04C05C06C07C08C09C10C11C12C14E11E12E18E19
+ G01G02G03G04G05G06G07G09G11G12G13G14G15G16G17G18G19
+ G20G21G22G23G24G25G26G27G28G29G30G31G32J01R01R02R03
+ R04R05R06R07R08R09R10R11R12R13R14R15R16R18R19R20R21
+ R22R23R24 00 00 00 00 00 00 00 00 00 00 00 00 00 00
WUM是
/* GNSS RESEARCH CENTER, WUHAN UNIVERSITY (WHU), P. R. CHINA(武汉大学)
/* POSITION AND NAVIGATION DATA ANALYST (PANDA) SOFTWARE
+ 71 G01G02G03G04G05G07G09G11G12G13G14G15G16G17G18G19G20
+ G21G22G23G24G25G26G27G28G29G30G31G32R01R02R03R04R05
+ R06R07R08R09R10R11R12R13R14R15R16R17R18R19R20R21R22
+ R23R24E11E12E18E19C01C02C03C04C05C06C07C08C09C10C11
+ C12C14J01 0 0 0 0 0 0 0 0 0 0 0 0 0 0
COM是/* CODE MGEX ORBIT SOLUTION(CODE)
包含卫星:
+ 68 G01G02G03G04G05G06G07G08G09G11G12G13G14G15G16G17G18
+ G19G20G21G22G23G24G25G26G27G28G29G30G31G32R01R02R03
+ R04R05R06R07R08R09R10R11R12R13R14R15R16R17R18R19R20
+ R21R22R23R24E11E12E18E19C06C07C08C09C10C11C12C14J01
gfz是GeoForschungsZentrum Potsdam(GFZ)
+ 53 G01G02G03G04G05G06G07G09G11G12G13G14G15G16G17G18G19
+ G20G21G22G23G24G25G26G27G28G29G30G31G32R01R02R03R04
+ R05R06R07R08R09R10R11R12R13R14R15R16R18R19R20R21R22
+ R23R24 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
grm是
+ 61 E11E12E14E19E22E24E26E30R01R02R03R04R05R06R07R08R09
+ R10R11R12R13R14R15R16R18R19R20R21R22R23R24G01G02G03
+ G05G06G07G08G09G11G12G13G14G15G16G17G18G19G20G21G22
+ G23G24G25G26G27G28G29G30G31G32 0 0 0 0 0 0 0
qzf
+ 31 G01G02G03G05G06G07G08G09G11G12G13G14G15G16G17G18G19
+ G20G21G22G23G24G25G26G27G28G29G30G31G32J01 0 0 0
tum是Technische Universitaet Muenchen (TUM)慕尼黑工业大学
+ 9 J01E11E12E14E19E22E24E26E30 0 0 0 0 0 0 0 0
国内也有一些单位可以生成此类文件。
参考:https://blog.youkuaiyun.com/zzh_my/article/details/50463318
2、NGA GPS数据
http://earth-info.nga.mil/GandG/update/index.php?action=home#tab_gnss
APC(事后),GPS Ephemeris Center of Mass(事后),Navdata(广播电文)和9-Day Orbit Prediction-Center of Mass(超前)
APC和NGA精密星历和navdata:http://earth-info.nga.mil/GandG/update/index.php?action=home#tab_gnss
APC数据格式:sp3 文件格式说明 https://blog.youkuaiyun.com/liuci3234/article/details/21971241
3、IGMAS数据
事后,超快精密星历等
IGMAS各种数据应有尽有:
http://www.igmas.org/Product/Cpdetail/detail/nav_id/36/cate_id/36.html
4、IGS数据
IGU,brdm, n, m, o等。
对于GPS卫星来说,需要清楚卫星质心和天线相位中心的区别。卫星轨道模型是针对于质心而言的,IGS提供的精密星历和精密卫星钟差是相对于卫星质心的,不同于广播星历是相对于卫星天线相位中心的。观测量是相对于卫星天线相位中心的。
参考文献:游振东.GNSS接收机内部性能检测方法的研究[D].武汉大学,2005.
IGS格式文档ftp://igs.org/pub data format
5、atx文件
ANTEX: The Antenna Exchange Format,质心相心改正文件
下载地址:ftp://igs.org/pub/station/general/igs14_2022.atx
格式说明:https://blog.youkuaiyun.com/zzh_my/article/details/45008621和
https://www.ngs.noaa.gov/ANTCAL/LoadFile?file=ngs08.atx
论文:Receiver and satellite antenna phase center offsets and variations
北斗广播星历精度评估http://www.doc88.com/p-4813121013975.html
北斗卫星广播星历精度分析http://www.doc88.com/p-8089038657954.html
常志巧,胡小工,郭睿,周善石,何峰,董恩强,李晓杰,董文丽.北斗导航卫星相位中心修正[J].武汉大学学报(信息科学版),2018,43(06):860-866.