275 items found

Correspondence, 1970-1972

Start Date:1970 End Date:1972	Creator:Papers of Kenneth I. Kellermann Series:Very Long Baseline Interferometry (VLBI) Series Unit:US - USSR VLBI Experiments Unit Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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Correspondence, 1989-1990

Start Date:1989-12-02 End Date:1990-05-09	Creator:Papers of Bernard F. Burke Series:Space VLBI Series Unit:RadioAstron Unit Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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Deployable Antenna Flight Experiment Preliminary Definition Study - Rough Draft Vol. II

	Creator:Papers of Bernard F. Burke Series:Space VLBI Series Unit:Quasat Unit Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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Early History of VLBI

Start Date:1967-02-15 End Date:1985-09-27	Creator:Papers of Marshall H. Cohen Series:Very Long Baseling Interferometry (VLBI) Series Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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Early Planetary VLBI

Start Date:1984-09-13 End Date:1985-04-09	Creator:Papers of Bernard F. Burke Series:Space VLBI Series Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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Email discussions on RadioAstron

Start Date:1988-05-18 End Date:1989-01-30	Creator:Papers of Robert L. Brown Series:Space Astronomy Series Unit:Space VLBI Unit Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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Estimates of benefits and costs of measuring polar motion and universal time using very long baseline interferometry and satellite laser ranging

Start Date:1977-05	Creator:Papers of Kenneth I. Kellermann Series:Very Long Baseline Interferometry (VLBI) Series Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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European VLBI handbook

Start Date:1991-05-01	Creator:Papers of Kenneth I. Kellermann Series:Very Long Baseline Interferometry (VLBI) Series Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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European VLBI Network

Start Date:1981 End Date:1983	Creator:Papers of Kenneth I. Kellermann Series:Very Long Baseline Interferometry (VLBI) Series Unit:Network Users Group Unit Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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European VLBI Network - EVN, 1996-2000

Start Date:1996-04-30 End Date:2000-09	Creator:Records of the NRAO Series:Very Long Baseline Interferometry (VLBI) Series Type:Text Subject:Very Long Baseline Interferometry (VLBI)	Description:Correspondence, notes, meeting agendas, reports, viewgraph copies

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European VLBI Network (EVN)

Start Date:1983-03 End Date:1987-11	Creator:Papers of Marshall H. Cohen Series:Very Long Baseling Interferometry (VLBI) Series Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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EVN Meetings, 1985-1995

Start Date:1985-06-11 End Date:1995-01-06	Creator:Records of the NRAO Series:Very Long Baseline Interferometry (VLBI) Series Type:Text Subject:Very Long Baseline Interferometry (VLBI)	Description:Correspondence, meeting agendas, meeting minutes

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Experimental data and notes

Start Date:1980-05-22 End Date:1980-06-02	Creator:Papers of Kenneth I. Kellermann Series:Very Long Baseline Interferometry (VLBI) Series Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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Export of VLBA recording system for RadioAstron

Start Date:1987-01 End Date:1990-01	Creator:Papers of Robert L. Brown Series:Space Astronomy Series Unit:Space VLBI Unit Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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Final Report: Mission Definition Study for a VLBI Station Utilizing the Space Shuttle

Start Date:1982-10-12	Creator:Papers of Bernard F. Burke Series:Space VLBI Series Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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First International VLBI Observations, January 1968

Start Date:1968-01-27 End Date:1968-02-03 People:Clark, Barry Kellermann, Kenneth I. Rydbeck, Olaf	Creator:Records of the NRAO Series:Photographs Series Unit:140 Foot Telescope Unit Type:Still Image Subject:Instruments--140 Foot Telescope Very Long Baseline Interferometry (VLBI)	Description:Through the spring and summer of 1967, the first successful interferometric observations with widely spaced antennas were made between NRAO's 85 Foot Tatel telescope and NRL's Maryland Point 85 foot, between the Algonquin Park 150 foot and the Penticton 25 meter, and using the MIT/Haystack 120 foot, the NRAO 140 foot, and the Hat Creek 85 foot. Olaf Rydbeck, Sweden's Onsala Observatory Director, wanted to get into VLBI, and his connection with Hein Hvatum, Rydbeck's former student who was at NRAO, led to plans for an NRAO-Onsala experiment. Another of Rydbeck’s students, Erick Kolberg, became the world’s expert in building maser amplifiers for radio astronomy, and his sensitive receivers using traveling wave masers were one of the attractions of using Onsala for VLBI. Recorders and clocks were shipped from Green Bank to Onsala, and the first international VLBI observations on 27 January-3 February 1968, at both 6 and 18 cm with a baseline of 6319 km, showed that some quasars and AGN were smaller than one thousandth of an arcsec. This was the highest angular resolution ever obtained for any astronomical observation; results were reported in ApJ. Within a year interferometer baselines had increased to intercontinental distances and the angular resolution to better than one thousandth of an arcsec.The 1971 Rumsford Prize was awarded jointly to the NRAO-Cornell, MIT-Haystack, and Canadian VLBI teams for their development of long-baseline interferometry. The photo is a composite showing the NRAO 140 Foot, with Barry Clark, who developed most of the technology for the VLBI observations and headed up the observations in Green Bank, and the Onsala 85 foot, with Olaf Rydbeck and Ken Kellermann; Ken and Claude Bare traveled from NRAO to Onsala for the observations. [show more]

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Four-Element CLBA Coverage with Other Arrays

Start Date:1984-03-12	Creator:Papers of Bernard F. Burke Series:Space VLBI Series Unit:Quasat Unit Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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Gain Loss Estimates for the 15-Meter 64-Gore Wrap-Rib Space-Based VLBI Reflector Antenna at 22 GHz

Start Date:1984-04-11	Creator:Papers of Bernard F. Burke Series:Space VLBI Series Unit:Quasat Unit Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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General Correspondence, 1966-1977

Start Date:1966-01-28 End Date:1977-06-08	Creator:Records of the NRAO Series:Very Long Baseline Interferometry (VLBI) Series Type:Text Subject:Very Long Baseline Interferometry (VLBI)	Description:Correspondence, memos, telegrams, press releases, charts, meeting minutes, reports, notes

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General File, 1988-2003

Start Date:1988-01-12 End Date:2003-05-16	Creator:Records of the NRAO Series:Very Long Baseline Interferometry (VLBI) Series Type:Text Subject:Very Long Baseline Interferometry (VLBI)	Description:Correspondence, reports, proposals, agreements

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General materials

Start Date:1974 End Date:1989	Creator:Papers of Kenneth I. Kellermann Series:Very Long Baseline Interferometry (VLBI) Series Unit:Network Users Group Unit Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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General Principles Concerning US Participation in RadioAstron - Draft 4/28/1990

Start Date:1990-04-18 End Date:1990-08-20	Creator:Papers of Bernard F. Burke Series:Space VLBI Series Unit:RadioAstron Unit Type:Text Subject:Very Long Baseline Interferometry (VLBI)	Description:Draft, correspondence.

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Global VLBI Working Group

Start Date:1990-05-16 End Date:1997-08	Creator:Records of the NRAO Series:Space VLBI Series Unit:VLBI Space Observatory Program (VSOP) Unit Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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Global VLBI Working Group Meeting

Start Date:1993-09-03 End Date:1993-09-04	Creator:Papers of Bernard F. Burke Series:Space VLBI Series Type:Text Subject:Very Long Baseline Interferometry (VLBI)

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Green Bank Ground Station

Start Date:1988 End Date:2002	Creator:Records of the NRAO Series:Space VLBI Series Unit:VLBI Space Observatory Program (VSOP) Unit Type:Text Subject:Very Long Baseline Interferometry (VLBI)