Long Base Line Interferometry: A New Technique

Broten, N. W.; Legg, T. H.; Locke, John; McLeish, C. W.; Richards, R. S.; Chisholm, R. M.; Gush, H. P.; Yen, J. L.; Galt, John

doi:10.1126/science.156.3782.1592

Cited by 66 publications

(14 citation statements)

References 7 publications

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“…The technique known as very long baseline interferometry (VLBI) was developed by radio astronomers in the late 1960s to attempt to resolve the compact radio emission from quasars and astronomical masers (e.g., Bare et al, 1967;Broten et al, 1967;Moran et al, 1967). The value of the technique for investigating a number of geophysical problems that require high-precision measurements, such as the determination of contemporary plate tectonic motions and variations in the Earth's orientation and rotation, was quickly pointed out and observations initiated (e.g., Carter et al, 1984;Gold, 1967;Herring et al, 1986;Hinteregger et al, 1972;Robertson, 1991;Robertson et al, 1983;Whitney et al, 1976).…”

Section: Introductionmentioning

confidence: 99%

Demonstration of a Broadband Very Long Baseline Interferometer System: A New Instrument for High‐Precision Space Geodesy

et al. 2018

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A prototype broadband geodetic very long baseline interferometry system has been implemented, and measurements of the baseline length over approximately two years, between December 2014 and January 2017, have been made in the process of exercising the system, developing operational procedures, and assessing geodetic precision for the new broadband observing concept. In addition to developing a broadband signal chain and installing the instrumentation on both a new 12-m antenna at the Goddard Geophysical and Astrophysical Observatory and the 18-m Westford antenna at the Massachusetts Institute of Technology Haystack Observatory, it was necessary to develop new correlation and analysis procedures to process the four-band, dual-linear-polarization data. A geodetic analysis of the data from 19 sessions that were observed during this period yielded a weighted root-mean-square deviation of the baseline length residuals about the weighted mean of 1.6 mm. These results validate several of the expectations set forth for the vision of the next-generation geodetic very long baseline interferometry system. Derome, M., et al. (2018). Demonstration of a broadband very long baseline interferometer system: A new instrument for high-precision space geodesy.

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Section: Introductionmentioning

confidence: 99%

Demonstration of a Broadband Very Long Baseline Interferometer System: A New Instrument for High‐Precision Space Geodesy

et al. 2018

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“…Astronomers have developed radio-interferometers with which the baselines between antennas can be measured with high precision over both short and very long distances (Bare et al, 1967;Broten et"al., 1967;Gubbay et al, 1974). These techniques, called Very-long-Baseline Interferometry (VLBI) have significant applications to geodesy (Gold, 1967;Shapiro and Knight, 1970).…”

Section: Introductionmentioning

confidence: 99%

Geodetic Surveying with Quasar Radio Interferometry

Stolz¹,

Harvey

Jauncey

et al. 1983

Australian Surveyor

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Geodetic Surveying with. Quasar Radio Interferometry A. STOLZ et alFrom 20 April to 3 May, 1982, five Australian radio-telescopes were linked for the first time and operated in synchronism to form a single radio-telescope. The link-up was the culmination of two years ofintensive effort and co-operation to co-ordinate telescope modifications and overcome the logistic problems ofun~ertakillg such an experiment. The five telescopes are sited at the NASA Deep Sydney, and the LANDSAT tracking station at Alice Springs. The simultaneous but independent operation of two or more widely separated telescopes is called Long-Baseline Interferometry. This experiment was set up to provide high-resolution radio maps of distant Southern Hemisphere quasars and galaxies. However, the experiment is of great interest to surveyors, since it also provides a means of making accurate position difference and distance measurements. It is expected, for instance, that the distance between the telescopes at Parkes and Tidbinbilla will be measured to an accuracy of 10 cm while the distances from the Tidbinbilla telescope to those at Hobart and Alice Springs will be determined to an accuracy of 1 to 2 metres. The experiment is described in this paper.The basic principles of the VLBI technique are also reviewed in general terms.

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“…It did not take long after the first successful detection of fringes with independent stations on baselines of 100s of km in 1967 [1,2] for attempts to be made with interferometer elements on inter-continental baselines [3]. Even in the pre-VLBI era, thoughts had already turned to space-based interferometers to surpass the restrictions posed by the size of the Earth (see Prologue), and less than a decade after first fringes, serious studies of space-ground interferometers as an intermediate step from purely ground-based to purely spacebased were being made.…”

Section: Introductionmentioning

confidence: 99%

A short history of space VLBI

Schilizzi¹

2012

Proceedings of Resolving the Sky - Radio Interferometry: Past, Present and Future — PoS(RTS2012)

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Space VLBI has a long and rich history involving many innovative ideas, studies, cultural exchanges, disappointments and successes. This short paper cannot do justice to all parts of the story, and will pick out a few highlights from my perspective. The story is mainly that of the lead up to the two successful missions, VSOP-HALCA and RadioAstron, and will cover the three main stages of space VLBI: the early days from 1977 to 1982, the study stage from 1983 to 1988, and the mission stage from 1989 to the present day.Resolving the Sky -Radio Interferometry: Past, Present and Future

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Long Base Line Interferometry: A New Technique

Cited by 66 publications

References 7 publications

Demonstration of a Broadband Very Long Baseline Interferometer System: A New Instrument for High‐Precision Space Geodesy

Demonstration of a Broadband Very Long Baseline Interferometer System: A New Instrument for High‐Precision Space Geodesy

Geodetic Surveying with Quasar Radio Interferometry

A short history of space VLBI

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