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Results for “VLBI”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 523 records · Page 29

All sources NASA NTRS DOE OSTI

NASA NTRS1999

JPL VLBI Group Report for 1998-1999

This report describes the transitional activities of the JPL Analysis Center.

Jacobs, Chris↗

NASA NTRS2004

Research and Development in Very Long Baseline Interferometry (VLBI)

Contents include the following: 1.Observation coordination. 2. Data acquisition system control software. 3. Station support. 4. Correlation, data processing, and analysis. 5. Data distribution and archiving. 6. Technique improvement and research. 7. Computer support.

Himwich, William E.↗

NASA NTRS2002

2003 Mars Exploration Rover orbit determination using delta VLBI data

The Mars Exploration Rover mission plans to launch two spacecraft, each containing one rover, and to deliver them to the surface of Mars allowing the rovers to collect science data on the surface.

MER orbit determination↗

NASA NTRS2001

Overview of JPL VLBI data analysis work

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verylong baseline interferometry troposhpere navig↗

NASA NTRS2000

The Sub-Parsec Structure of Accretion Disks as Revealed by VLBI Imaging of Free-Free Absorption

The physical conditions in the inner parsec of accretion disks believed to orbit the central black holes in active galactic nuclei can be probed by imaging the absorption of background radio emission by ionized gas in the disk.

Active Galaxies Accretion Disks Interferometry↗

NASA NTRS1997

The Starburst - AGN Connection II: The Nature of Luminous Far Infrared Galaxies as Revealed by VLBI, Radio, Infrared and Optical Observations

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Starburst Far Infrared Optical Observation Radio C↗

NASA NTRS1997

Earth Rotation Parameters from DSN VLBI: 1997

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Earth Ratation↗

NASA NTRS1996

VLBI Observations of GRO J1655-40

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x-ray gro j1655-40↗

NASA NTRS1996

VLBI Observations of Southern Egret Identifications. I. PKS 0521-365, and PKS 0537-441

We present high-resolution very long baseline interferometry images of three southern radio sources that the Energetic Gamma-Ray Experiment Telescope (EGRET), on board the Compton Gamma Ray Observatory, has identified as greater than 100 MeV gamma-ray sources.

galxies gamma rays interferometry SAS 2 COS B↗

NASA NTRS1994

5-GHz VLBI Imaging of the Gravitational Lens PKS 1830-211

The strong radio source PKS 1830-211 consists of two compact components located on opposite sides of a fainter ring of radio emission 1 arcsecond in diameter.

propagation delays↗

NASA NTRS1993

Techniques for Minimizing Tropospheric Path Delay Effects in Astrometric and Geodetic VLBI

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dry-component refractivity↗

NASA NTRS1992

High-Precision VLBI Astrometric Observations of Radio-Emitting Stars for Detection of Extra-Solar Planets

Measurement of the displacement of a radio-emitting star around the barycenter of a possible planetary system can be carried out by astrometric.

radio-emitting stars astrometric monitoring progra↗

NASA NTRS1992

2.3 GHz VLBI Images of Southern Hemisphere Radio Galaxies and Quasars

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Radio Galaxies Southern Hemisphere↗

NASA NTRS1993

Dichroic Design for the Orbiting VLBI Earth Station Antenna

In this paper the design and performance of a single screen frequency selective surface with gridded square loop patch elements are described for diplexing the X-and Ku-band signals in an Orbiting Very Long Baseline Interferometer (OVLBI) earth station reflector antenna system.

gridded square element resonant frequency drift Or↗

NASA NTRS1993