ITRS and ITRF: What are the ITRS and the ITRF? ITRF Products : Description of ITRF solutions, download. Relationship between ITRS realizations, transformation parameters.

Following the procedure already used for previous ITRF solutions, the ITRF2020 uses as input data time series of station positions and Earth Orientation Parameters (EOPs) provided by the Technique Centers of the four space geodetic techniques (VLBI, SLR, GNSS and DORIS), as well as local ties at colocation sites. Based on completely reprocessed ...

The International Terrestrial Reference System (ITRS) is a world spatial reference system co-rotating with the Earth in its diurnal motion in space. The IERS, in charge of providing global references to the astronomical, geodetic and geophysical communities, supervises the …

The IERS ITRS Product Center is indebted to the Technique Services (IDS, ILRS, IGS and IVS) and their Analysis and Combination Centers for their contribution by providing reprocessed solutions. The quality of the ITRF2014 is certainly benefiting from technique improved solutions.

Transformation parameters between ITRF Solutions. The relationships linking the realizations of the ITRS is of utmost importance. They are based on transformation parameters (called Helmert parameters). They can be used to compare data or results expressed in …

The IERS ITRS Product Center is particularly grateful to all the institutions who provide the necessary investment for the space geodetic observatories which constitute the main ITRF foundation.

recent submissions from GPS and DORIS specifically asked to improve ITRF by supplying new stations or recent positions to upgrade velocities. The individual solutions selected for the ITRF96 analysis are 4 VLBI , 2 SLR , 8 GPS and 3 DORIS solutions, summarized in $\tab1$.

In their submissions to ITRF, almost all the individual analysis centers adopte a unique epoch for all station positions. Meanwhile, it could sometime occur that, due to maybe some data sampling reasons, the selected unique epoch degrade the inner quality of the solution.

Three years after its release, the ITRS Center has initiated regular (yearly) updates of ITRF2020 motivated by a number of reasons, including: the stability of the ITRF long-term origin, evaluated to be at the level of or better than 5 mm and 0.5 mm/yr for its time evolution,

Commands. Click: open feature information popup.; Maintain Ctrl then Click & Drag & release: Select points with a DragBox; Maintain Ctrl + Shift then Click, move & click: Select points within a circle.; Filters