3
Fig. 1 The compilation of GAMP in Linux
4 GNSS data downloads
GAMP also includes some useful GNSS download tools written in C shell. By
convention, we have the following definitions firstly:
WWWW: GPS week
WWWWD: GPS week and day of week
YY: 2-digit year
YYYY: 4-digit year
DDD: day of year
MM: month
sh_code_dcb: to download GPS and GLONASS differential code bias (DCB)
files provided by CODE from ftp://ftp.unibe.ch/aiub/CODE/YYYY
sh_mgex_dcb: to download Multi-GNSS DCB files provided by CAS and DLR
from ftp://igs.ign.fr/pub/igs/products/mgex/dcb/YYYY
sh_igs_prod: to download GPS and/or GLONASS precise orbit and clock
products of IGS from ftp://igs.ign.fr/pub/igs/products/WWWW or
ftp://cddis.gsfc.nasa.gov/pub/gps/products/WWWW
sh_igs_snx: to download solution independent exchange (SINEX) format
weekly files from ftp://igs.ign.fr/pub/igs/products/WWWW or
ftp://cddis.gsfc.nasa.gov/pub/gps/products/WWWW
sh_mgex_prod: to download multi-GNSS precise orbit and clock products of
MGEX from ftp://igs.ign.fr/pub/igs/products/mgex/WWWW or
ftp://cddis.gsfc.nasa.gov/pub/gps/products/mgex/WWWW
sh_cddis_nav: to download GPS, GLONASS, and multi-GNSS broadcast
ephemeris files from ftp://cddis.gsfc.nasa.gov/pub/gps/data/daily/YYYY/brdc,
ftp://cddis.gsfc.nasa.gov/pub/gps/data/campaign/mgex/daily/rinex3/YYYY/brdm
sh_code_ion: to download CODE global ionosphere map (GIM) files
(CODGDDD0.YYI.Z) from ftp://ftp.unibe.ch/aiub/CODE/YYYY
sh_igs_obs: to download GPS and GLONASS observation files from
ftp://cddis.gsfc.nasa.gov/pub/gps/data/daily/YYYY/DDD/YYo
sh_mgex_obs: to download multi-GNSS observation files from
ftp://igs.ign.fr/pub/igs/data/campaign/mgex/daily/rinex3/YYYY/DDD *.crx.gz
ftp://igs.ign.fr/pub/igs/data/campaign/mgex/daily/rinex3/YYYY/DDD *d.Z
ftp://cddis.gsfc.nasa.gov/pub/gps/data/daily/YYYY/DDD/YYd *.crx.gz