Locating IGS data, products, and format definitionsKey to directory and file name variables
dday of week (0-6)
ssss4-character IGS site ID or 4-character LEO ID
dddday of year (1-366)
ww2-digit week of year(01-53)
hh2-digit hour of day (00-23)
wwww4-digit GPS week
hsingle letter for hour of day
(a-x = 0-23)
yy2-digit year
mmminutes within hour
yyyy4-digit year
leoname of low-earth orbiting satellite

Software to uncompress files ending in .Z is available from http://www.gzip.org
(This will assist you in locating and using IGS data and products. It is not an exhaustive compilation of all files and directories available at the Data Centers)

Plain text data center guides are also available.

Dark Purple = the path you are examining Buff = Files in this directory Light Purple = Other directories on this server Gray = other Data Centers

CDDIS: Greenbelt, MD, USA SOPAC: San Diego, CA, USA IGN: Paris, France KASI: Daejon, Republic of Korea IGS CB: Pasadena, CA, USA
ftp://igscb.jpl.nasa.gov
pub/
product/
(link to this directory)
wwww/ cumulative Earth Rotation parameters 00 file (pre-IGS05) igs00p02.erp
00 file (since w1412) igs00p03.erp
96 file igs96p02.erp
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