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The 64-m Antenna Automatic Subreflector Focusing ControllerDefocussing of the radio frequency beam arises from gravity-induced structural deformations as the 64 m Deep Space Network antenna rotates about the elevation axis. The subreflector controller generates the axial (z) and lateral (y) offset corrections necessary to move the subreflector, thus minimizing the gain losses due to this defocussing. The technique used to determine these offset errors is discussed, and a description of the new subreflector controller is presented.
Document ID
19840024557
Document Type
Reprint (Version printed in journal)
Authors
Guiar, C. N. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Duff, L. W. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 12, 2013
Publication Date
August 15, 1984
Publication Information
Publication: The Telecommun. and Data Acquisition Rept.
Subject Category
COMMUNICATIONS AND RADAR
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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