Precise geodesy with the Very 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...
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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...
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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...
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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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Astrometry can bring powerful constraints to bear on a variety of scientific questions about neutron stars, including their origins, astrophysics, evolution, and environments. Using phase-referenced observations at the VLBA, in conjunction with pulsar gating and in-beam calibration, we have measured the parallaxes and proper motions for 14 pulsars. The smallest measured parallax in our sample i...
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ژورنال
عنوان ژورنال: Journal of Geodesy
سال: 2009
ISSN: 0949-7714,1432-1394
DOI: 10.1007/s00190-009-0304-7