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Diagnosing a PDS microdensitometerA number of diagnostic tests are developed for the Photometric Data System PDS 2020G microdensitometer to monitor its performance and to isolate various electromechanical problems. A number of tests which help to diagnose problems with the photometer, positional accuracy and data collection are described. The tests include: (1) scanning a razor blade edge to study the response of the photometer and zero point losses in the coordinate system, (2) scanning a long straight line to evaluate the drunkness of the stage motions, (3) scanning photometric step wedge calibrations to study the response of the photometer, and (4) measurement of a series of high signal to noise plates of the same region of the sky to evaluate the overall performance of the microdensitometer. A variety of electronic tests to isolate electromechanical problems are also performed.
Document ID
19840019952
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Vanaltena, W.
(Yale Univ. Observatory New Haven, CT, United States)
Lee, J. F.
(Yale Univ. Observatory New Haven, CT, United States)
Wandersee, A.
(Yale Center for Electronic Services)
Date Acquired
August 12, 2013
Publication Date
July 1, 1984
Publication Information
Publication: NASA. Goddard Space Flight Center Astron. Microdensitometry Conf.
Subject Category
Instrumentation And Photography
Accession Number
84N28021
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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