ITRS meaning in International ?

Answer: What is International Terrestrial Reference System mean?

The International Terrestrial Reference System (ITRS) describes procedures for creating reference frames suitable for use with measurements on or near the Earth's surface. This is done in much the same way that a physical standard might be described as a set of procedures for creating a realization of that standard. The ITRS defines a geocentric system of coordinates using the SI system of measurement.

An International Terrestrial Reference Frame (ITRF) is a realization of the ITRS. Its origin is at the center of mass of the whole earth including the oceans and atmosphere. New ITRF solutions are produced every few years, using the latest mathematical and surveying techniques to attempt to realize the ITRS as precisely as possible. Due to experimental error, any given ITRF will differ very slightly from any other realization of the ITRF. The difference between the latest WGS 84 and the latest ITRF (as of 2006) is only a few centimeters.

The ITRS and ITRF solutions are maintained by the International Earth Rotation and Reference Systems Service (IERS). Practical navigation systems are in general referenced to a specific ITRF solution, or to their own coordinate systems which are then referenced to an ITRF solution. For example, the Galileo Terrestrial Reference Frame (GTRF) is used for the Galileo navigation system; currently defined as ITRF2005 by the European Space Agency.

reference

Full Form	Category
Industrial Ties Research Subprogram	Academic & Science
International Technology Roadmap For Semiconductors	Computing
Innovative Technology Research Syndicate	Computing
Iers Terrestrial Reference System	General
Icase Technical Report Server	General
International Technical Rescue Symposium	General
International Temperate Reefs Symposium	General
International Transaction Reporting System	General
Intersection Types and Related Systems	General
International Tech Rescue Symposium	General
Infosys Transaction Reconciliation System	General
Intermediate Tripped Rollover Simulation	General
International Terrestrial Reference System	International