Jan Kouba [ link-1708-0029 ] Link to IGS : Since 1994, the International GNSS Service (IGS) has provided precise GPS orbit products to the scientific community with increased precision and timeliness. Many national geodetic agencies and GPS users interested in geodetic positioning have adopted the IGS precise orbits to achieve centimeter level accuracy and ensure… Read More »
Claude Boucher, CGPC [ link-1708-0014 ] Link to IGS : Brief – This document describes the Galileo Terrestrial Reference Frame (GTRF), use of Galileo for ITRF, organisational aspects, liabiliy of ITRF. This presented in IGS Workshop at Bern in 2004.
IERS Technical Note [ link-1708-0013 ] Link to IERS : Terrestrial Reference Systems and their realizations. A Terrestrial Reference System (TRS) is a spatial reference system co-rotating with the Earth in its diurnal motion in space. In such a system, positions of points attached to the solid surface of the Earth have coordinates which undergo… Read More »