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Summary Of: VLBI

The VLBI technique enables this distance to be much greater than that possible with conventional interferometry... The greater telescope separations are possible in VLBI due to the development of the... allowing VLBI to produce images with superior resolution... VLBI is most well... since the VLBI technique measures the time differences between the arrival of radio waves at separate antennas... Using VLBI in this manner requires large numbers of time difference measurements from distant sources... There are several VLBI arrays located in Europe... The most sensitive VLBI array in the world is the... based VLBI antennas such as... Recently it has become possible to connect the VLBI radio telescopes in real... shows the first science produced by the European VLBI Network using e... VLBI Space Observatory Program... around the Earth to enable VLBI observations on baselines between space and ground... available for ground VLBI at the same observing... VLBI instrument available to the scientific community... The International VLBI Service for Geodesy and Astrometry... the VLBI analysis center at the Paris Observatory...

Encyclodia Page On: VLBI

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An antenna of the Goldstone Deep Space Communications Complex. Among other tasks, it has been used for VLBI. | | Goldstone Deep Space Communications Complex | astronomical interferometry | radio astronomy | atomic clock | coaxial cable | waveguide | optical fiber | transmission line | closure phase | Roger Jennison | astrometry | tectonic plates | geodesy | quasars | quasar | interferometry | celestial reference frame | gravitational forces | Sun | Moon | speed of gravity | Huygens probe | Titan's | European VLBI Network | Joint Institute for VLBI in Europe | Very Long Baseline Array | HALCA | Image of the source IRC+10420 submitted by Magarrett. The lower resolution image on the left image was taken with the UK's MERLIN array and shows the shell of maser emission produced by an expanding shell of gas with a diameter about 200 times that of our own Solar System. The shell of gas was ejected from a supergiant star (10 times the mass of our sun) at the centre of the emission about 900 years ago. The corresponding EVN e-VLBI image (right) shows the much finer structure of the masers because of the higher resolution of the VLBI array. | | maser | Europe | radio telescopes | EVN | GEANT2 | JIVE | JPL | NASA | VSOP | Japan | HALCA | radio telescope | orbit | telescopes | active galactic nuclei | masers | radio stars | pulsars | resolution | frequencies | Doppler | spacecraft | Recording data at each of the telescopes in a VLBI array. Extremely accurate high-frequency clocks are recorded alongside the astronomical data in order to help get the synchronization correct | | RAID | maser | GEANT2 | Playing back the data from each of the telescopes in a VLBI array. Great care must be taken to synchronize the play back of the data from different telescopes. Atomic clock signals recorded with the data help in getting the timing correct. | | Atomic clock | interferometer | R. C. Jennison | closure phase | | cite | references or sources | reliable sources | Unverifiable | Categories | Astronomical imaging | Interferometry | Radio astronomy | Geodesy | Radio telescopes | Articles lacking sources from June 2007 | All articles lacking sources |
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "VLBI".