Tools and Resources

We bring together here a list of useful subscription-free packages and services, and supporting documents, that are in the public domain:

Tools

7-zip, a versatile open source file archiver, with a high compression ratio and self-extraction capability.
Compact RINEX decompression utility, the tar and tar.gz files can be opened with 7-zip.
Coordinate conversion online, by APSalin.
Coordinate transformation tool, ETRS89 <-> OSGB36, by Ordnance Survey of Great Britain.
Day-of-year to conventional calendar look up table.
GNSS data translation, editing and quality checking, by TEQC - the toolkit for GPS, GLONASS, Galileo and SBAS data.
GPS date converter.
GPS post-processing online services, access details and a comparison, by GPS World magazine.

Download national network 30 second reference station RINEX data for the Ordnance Survey of Great Britain (OSGB) network, for the latest 45 day period.
Download national network 30 second reference station RINEX data for the Ordnance Surveys of Ireland (OSi) and Northern Ireland (OSNI) networks, for the latest 30 day period.
Request historical 30 second reference station RINEX data with a data age of more than 30 days, for OSGB, OSi and OSNI networks.
Download 30 second regional reference station RINEX data for the EUREF Permanent Network (EPN); some stations sample at a higher rate of 1Hz.
Download 30 second global reference station RINEX data for the International GNSS Service (IGS) network; some stations sample at interval t, where 1 sec < t < 10 sec.
Download broadcast and precise ephemerides from the IGS; and more easily perhaps, via the IGS archive at NASA.