Index: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Home > International Terrestrial Reference System

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 IERS defines a geocentric system of coordinates using the SI system of measurement.

An International Terrestrial Reference Frame (ITRF) is a realization of the IERS. New ITRF solutions are produced every few years, using the latest mathematical and surveying techniques to attempt to realize the IERS as precisely as possible. Due to experimental error, any given ITRF will differ very slightly from any other realization of the ITRF.

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.

The ITRS and ITRF solutions are maintained by the International Earth Rotation and Reference Systems Service ( IERS).

This article is a stub. You can help Wikipedia by [ ṣlocalurl: : |action=edit}} expanding it].

-- need lots about the details of ITRS and ITRF

1 See also

International Celestial Reference System
geodetic system
World Geodetic System

2 External links

Standards Geodesy

Read more »

<Hide>

Topics: International Terrestrial Reference System, International...

International Atomic TimeTemps Atomique International TAI or International Atomic Time is a very accurate and stable time scale. It is an average of the time kept by many caesium clocks ( atomic clocks) all over the world, and has been available since 1955. True high-precision TA	International GrandmasterThe title International Grandmaster is awarded to superb chess players by the world chess organization FIDE. It is a lifetime title, in chess literature usually abbreviated as GM or IGM (this is in contrast to WGM for Woman Grandmaster and IM for Internat	International tradeInternational trade is defined as trade between two or more partners from different countries (an exporter and an importer). Early international trade consisted mostly of barter transactions. International trade is also a branch of economics. Traditionall
International Phonetic AlphabetThis article is about the alphabet officially used in linguistics. The NATO phonetic alphabet ("alpha bravo") has been informally and nonstandardly called the International Phonetic Alphabet as well. The International Phonetic Alphabet is a phonetic alpha	International Olympiad in InformaticsThe International Olympiad in Informatics (IOI is an annual informatics competition for secondary school students. The first IOI was held in 1989. The contest consists of two days computer programming, solving problems of an algorithmic nature. Students c	International lawInternational law deals with the relationships between states, or between persons or entities in different states. It sub-divides into "public international law", and " private international law". When used without an adjective, "international law" genera
International organization	International Telecommunication Union	International Mathematical Union
International Council for Science	International Hydrographic Organization	International Astronomical Union
International Criminal Court	International Court of Justice	International Convention for the Regulation of Whaling

Non User