IVS meaning in Academic & Science ?

Answer:

What is International VLBI Service mean?

Very-long-baseline interferometry (VLBI) is a type of astronomical interferometry used in radio astronomy. In VLBI a signal from an astronomical radio source, such as a quasar, is collected at multiple radio telescopes on Earth or in space. The distance between the radio telescopes is then calculated using the time difference between the arrivals of the radio signal at different telescopes. This allows observations of an object that are made simultaneously by many radio telescopes to be combined, emulating a telescope with a size equal to the maximum separation between the telescopes.

Data received at each antenna in the array include arrival times from a local atomic clock, such as a hydrogen maser. At a later time, the data are correlated with data from other antennas that recorded the same radio signal, to produce the resulting image. The resolution achievable using interferometry is proportional to the observing frequency. The VLBI technique enables the distance between telescopes to be much greater than that possible with conventional interferometry, which requires antennas to be physically connected by coaxial cable, waveguide, optical fiber, or other type of transmission line. The greater telescope separations are possible in VLBI due to the development of the closure phase imaging technique by Roger Jennison in the 1950s, allowing VLBI to produce images with superior resolution.

VLBI is best known for imaging distant cosmic radio sources, spacecraft tracking, and for applications in astrometry. However, since the VLBI technique measures the time differences between the arrival of radio waves at separate antennas, it can also be used "in reverse" to perform earth rotation studies, map movements of tectonic plates very precisely (within millimetres), and perform other types of geodesy. Using VLBI in this manner requires large numbers of time difference measurements from distant sources (such as quasars) observed with a global network of antennas over a period of time.

reference

Full Form	Category
International VLBI Service	Academic & Science
International Viola Society	Academic & Science
Island View Shipping	Business
Incredible Value Services	Business
Investment Valuation Standards	Business
Incredibly Valued Services	Business
Conference on Intelligent Vehicles	Community
Illinois Virtual School	Community
Industrial Valve Summit	Community
International Vigilance Squad	Community
Indus Valley School	Community
Integrated Video Services	Computer and Networking
Indus Valley Software	Computing
Integrated Video System	Computing
Internet Video Streaming	Computing
Internet Via Satellite	Computing
Internet Video Sharing	Computing
Internet Video Server	Computing
Indexed Value Set	General
Ideographic Variation Sequence	General
Innovative Vacuum Solutions	General
Innovative Viewing Systems	General
Independent Voting Services	General
Illinois Valley Striders	General
Installation Verification Sample	General
Individual Values These	General
Instant Virtual System	General
Innovative Vending Solutions	General
Interactive Voting System	General
Infosys Validation Solutions	General
Intelligent Vision System	General
Intelligent Vehicle Solutions	General
Invalid Vehicle Service	General
Idle Valid Signal	General
In Vehicle Signing	General
In Vehicle Storage	General
In Vehicle Surveillance	General
Innovative Vehicle Solutions	General
Intelligent Vehicle Support	General
In Vehicle Solutions	General
In Vehicle Software	General
Indigo Virtual Switch	General
Individual Values and Serve	General
Itial Value Statement	General
Internal Versioning System	General
Intellectual Virtual String	General
Infosys Validation Services	General
Intelligent Vehicles Symposium	General
Industrial Vehicle Specialties	General
Intelligent Vehicle Systems	General
In Vehicle Sensor	General
Institute for Visual Studies	Governmental
Institute for Vaccine Safety	Governmental
Independent Vehicle Service	Governmental
In Vehicle System	Governmental
Idle Validation Switch	Governmental
International Voluntary Services	International
International Veterinary Sciences	International
International Visiting Student	International
International Valuation Standards	International
Internal Value Structure	Medical
International Veterinary Seminars	Medical
Iowa Veterinary Specialties	Medical
Itchy Vagina Syndrome	Medical
Identified Validated Samples	Medical
Intact Ventricular Septum	Medical
Interactive Video Services	Telecommunication