THE LONG BASELINE ARRAY
نویسندگان
چکیده
منابع مشابه
Precise geodesy with the Very Long Baseline Array
We report on a program of geodetic measurements between 1994 and 2007 which used the Very Long Baseline Array and up to 10 globally distributed antennas. One of the goals of this program was to monitor positions of the array at a 1 millimeter level of accuracy and to tie the VLBA into the International Terrestrial Reference Frame. We describe the analysis of these data and report several intere...
متن کاملThe Use of the Long Baseline Array in Australia for Precise Geodesy and Absolute Astrometry
We report the results of a successful 12 hour 22 GHz VLBI experiment using a heterogeneous network that includes radio telescopes of the Long Baseline Array (LBA) in Australia and several VLBI stations that regularly observe in geodetic VLBI campaigns. We have determined positions of three VLBI stations, atca-104, ceduna and mopra, with an accuracy of 4–30 mm using a novel technique of data ana...
متن کاملPulsar Parallaxes at 5 Ghz with the Very Long Baseline Array
We present the first pulsar parallaxes measured with phase-referenced pulsar VLBI observations at 5 GHz. Due to the steep spectra of pulsars, previous astrometric measurements have been at lower frequencies. However, the strongest pulsars can be observed at 5 GHz, offering the benefit of lower combined ionospheric and tropospheric phase errors, which usually limit VLBI astrometric accuracy. The...
متن کاملVery Long Baseline Array observations of the Intraday Variable source J 1128 + 592
Context. Short time-scale flux density variations of flat spectrum radio sources are often explained by the scattering of radio waves in the turbulent ionized Interstellar Matter of the Milky Way. One of the most convincing observational arguments in favor of this is the annual modulation of the variability time-scale caused by the Earth orbital motion around the Sun. J1128+5925 is a recently d...
متن کاملDetermination of Angular Separation Between Spacecraft and Quasars with the Very Long Baseline Array
The interferometric technique of phase referencing was used to determine the relative angular positions of the Mars Exploration Rover B (MER-B) spacecraft with respect to angularly nearby quasars. The final cruise state of MER-B was observed in three sessions by the Very Long Baseline Array (VLBA) as part of a larger feasibility study to determine the accuracy of this technique. This article su...
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ژورنال
عنوان ژورنال: Publications of The Korean Astronomical Society
سال: 2015
ISSN: 1225-1534
DOI: 10.5303/pkas.2015.30.2.659