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
ftp://nfs.kasi.re.kr		 IGS CB: Pasadena, CA, USA
gps/ glonass/
data/ products/
wwww/
(link to this directory; sample week=1355)		 ionex/ leopp/ trop/ (erp files)
IGS weekly Reference Frame products Earth Rotation Parameters igsyyPwwww.erp
itr file igsyyPwwww.itr
Station Positions igsyyPwwww.snx
ssc file igsyyPwwww.ssc
Summary file igsyyPwwww.sum
IGS Ultrarapid products Precise satellite orbits and clocks iguwwwwd_hh.sp3
Earth rotation parameters iguwwwwd_hh.erp
Summary report iguwwwwd_hh.sum
Comparative summary report iguwwwwd_hh_cmp.sum
IGS Rapid products Precise satellite orbits and clocks igrwwwwd.sp3
5 minute satellite and station clocks igrwwwwd.clk
cls file igrwwwwd.cls
Earth Rotation Parameters igrwwwwd.erp
Summary report igrwwwwd.sum
IGS Final products Precise satellite orbits and clocks igswwwwd.sp3
5 minute satellite and station clocks igswwwwd.clk
cls file igswwwwd.cls
Earth Rotation Parameters igswwww7.erp
Summary report igswwww7.sum
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