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Time frequency requirements for radio interferometric earth physicsTwo systems of VLBI (Very Long Baseline Interferometry) are now applicable to earth physics: an intercontinental baseline system using antennas of the NASA Deep Space Network, now observing at one-month intervals to determine UTI for spacecraft navigation; and a shorter baseline system called ARIES (Astronomical Radio Interferometric Earth Surveying), to be used to measure crustal movement in California for earthquake hazards estimation. On the basis of experience with the existing DSN system, a careful study has been made to estimate the time and frequency requirements of both the improved intercontinental system and of ARIES. Requirements for the two systems are compared and contrasted.
Document ID
19750003205
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Thomas, J. B. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Fliegel, H. F. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1973
Publication Information
Publication: NASA. Goddard Space Flight Center Proc. of the 5th Ann. NASA and DOD Precise Time and Time Interval Planning Meeting
Subject Category
Geosciences (General)
Accession Number
75N11277
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19750003203Collected WorksProceedings of the fifth annual NASA and Department of Defense Precise Time and Time Interval Planning Meeting19750003203Collected WorksProceedings of the fifth annual NASA and Department of Defense Precise Time and Time Interval Planning Meeting
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