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A high data rate recorder for astronomyA magnetic tape recorder developed for the special requirements of radio astronomy and geodesy is described. These requirements include a high bit packing density and long record times. The current version of this longitudinal recorder used by the Very Long Baseline Array (VLBA) records 5.5 Terabits on a 14-in diameter reel of inch-wide tape. A maximum record rate of 256 Mb/s is achieved in the VLBA configuration with one recorder operating at 4 ms and utilizing 32 of the heads in a single stack. The VLBA recorders have been tested using a longitudinal density of 2.25 fr/micron; 448 data + 56 system tracks are recorded in 14 passes, each lasting 50 min, for a total record time (at 128 Mb/s) of 12 h on 14-in diameter reel of inch-wide 13-microns-thick D1-equivalent tape.
Document ID
19910057847
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hinteregger, H. F.
(Northeast Radio Observatory Corp. Westford, MA, United States)
Rogers, A. E. E.
(Northeast Radio Observatory Corp. Westford, MA, United States)
Cappallo, R. J.
(Haystack Observatory Westford, MA, United States)
Webber, J. C.
(Interferometrics, Inc. Vienna, VA, United States)
Petrachenko, W. T.
(Geological Survey of Canada Ottawa, United States)
Date Acquired
August 15, 2013
Publication Date
May 1, 1991
Publication Information
Publication: IEEE Transactions on Magnetics
Volume: 27
ISSN: 0018-9464
Subject Category
Instrumentation And Photography
Accession Number
91A42470
Distribution Limits
Public
Copyright
Other

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