Very Long Baseline Interferometer
Very Long Baseline Interferometer

Author: Fujinobu Takahashi

Publisher: IOS Press

Published: 2000

Total Pages: 260

ISBN-13: 9784274903786

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VLBI is an acronym for Very Long Baseline Inferometry, and can be roughly divided into two areas of application. The first area is in geodesy, which is covered in considerable detail in this book. The second area is in astrometry, or radio astronomy, which is only briefly treated in the book.

Radio Interferometry and Satellite Tracking
Radio Interferometry and Satellite Tracking

Author: Seiichiro Kawase

Publisher: Artech House

Published: 2012

Total Pages: 258

ISBN-13: 1608070964

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Worldwide growth of space communications has caused a rapid increase in the number of satellites operating in geostationary orbits, causing overcrowded orbits. This practical resource is designed to help professionals overcome this problem. This timely book provides a solid understanding of the use of radio interferometers for tracking and monitoring satellites in overcrowded environments. Practitioners learn the fundamentals of radio interferometer hardware, including antennas, receiving equipment, signal processing and phase detection, and measurement accuracies. This in-depth volume describes the nature of the targets to be tracked by the interferometer, helping to clarify the movement of target satellites and what specific information has to be caught by the interferometer. Additionally, engineers find details on applications to practical cases of satellite tracking, covering different types of interferometers, recent technical developments, orbital monitoring and safety control.

Laser Ranging and Very-Long-Baseline Interferometry for Geodetic Applications
Laser Ranging and Very-Long-Baseline Interferometry for Geodetic Applications

Author: Irwin I. Shapiro

Publisher:

Published: 1978

Total Pages: 7

ISBN-13:

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Three distinct tasks were undertaken to advance the application of space techniques to the measurement of geodetic parameters: error analyses were performed to estimate the accuracy with which the locations of satellite tracking stations and the motion of the earth's pole may be determined from laser-ranging observations of the LAGEOS satellite; a numerical model of the moon's rotation was developed to support the analysis of lunar laser ranging observations; and a very-long-baseline interferometry (VLBI) system was constructed and installed at the Onsala Space Observatory in Sweden for use in a program to monitor the earth's rotation through observations of extragalactic radio sources. The details of this work have been described in three previously published reports. (Author).

Research in Geodesy Based Upon Radio Interferometric Observations of GPS (Global Positioning System) Satellites
Research in Geodesy Based Upon Radio Interferometric Observations of GPS (Global Positioning System) Satellites

Author: Charles C Counselman (III.)

Publisher:

Published: 1986

Total Pages: 18

ISBN-13:

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MIT explored and extended the capabilities of the new technique of geodesy by radio interferometry using signals from the NAVSTAR Global Positioning System (GPS) satellites. Accuracy in the determination of long relative-position, or 'baseline', vectors between fixed points on the earth was improved by the use of doubly differenced, dual frequency (LI and L2 band). Carrier phase observations, and by determining the orbits of the satellites from observations at widely spaced sites whose relative positions were well known a priori from quasar observations. Accuracy of about 1 part in 10 million of the length of a long baseline, and 1 millimeter for a short baseline, was achieved. Keywords: Geodetic survey; Geodetic control; VLBI (Very Long Baseline Interferometry); Satellite geodesy; Satellite tracking; Satellite orbits; Orbit determination.

Interferometric Tracking System for the Tracking and Data Relay Satellite
Interferometric Tracking System for the Tracking and Data Relay Satellite

Author: National Aeronautics and Space Adm Nasa

Publisher: Independently Published

Published: 2018-12-31

Total Pages: 38

ISBN-13: 9781792782558

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This report documents construction and testing of the Interferometric Tracking System project developed under the NASA SBIR contract NAS5-30313. Manuals describing the software and hardware, respectively entitled: 'Field Station Guide to Operations' and 'Field Station Hardware Manual' are included as part of this final report. The objective of this contract was to design, build, and operate a system of three ground stations using Very Long Baseline Interferometry techniques to measure the TDRS orbit. The ground stations receive signals from normal satellite traffic, store these signals in co-located computers, and transmit the information via phone lines to a central processing site which correlates the signals to determine relative time delays. Measurements from another satellite besides TDRS are used to determine clock offsets. A series of such measurements will ultimately be employed to derive the orbital parameters, yielding positions accurate to within 50 meters or possibly better. Effland, John E. and Knight, Curtis A. and Webber, John C. NASA-CR-193274, NAS 1.26:193274 NAS5-30313; SBIR-07.03-8500...

Interferometry and Synthesis in Radio Astronomy
Interferometry and Synthesis in Radio Astronomy

Author: A. Richard Thompson

Publisher: Wiley-Interscience

Published: 1986-04-28

Total Pages: 568

ISBN-13:

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A unified description of the theory and practice of radio interferometry and synthesis mapping techniques as they apply to astronomy and geology. Beginning with an historical review, it goes on to provide a detailed description of all aspects of radio inferometry, from basic principles through instrumental design to data reduction. Over 450 original papers and monographs are cited.