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Radiance calibration of the High Altitude Observatory white-light coronagraph on SkylabThe processing of over 35,000 photographs of the solar corona obtained by the white-light coronograph on Skylab is described. Calibration of the vast amount of data was complicated by temporal effects of radiation fog and latent image loss. These effects were compensated by imaging a calibration step wedge on each data frame. Absolute calibration of the wedge was accomplished through comparison with a set of previously calibrated glass opal filters. Analysis employed average characteristic curves derived from measurements of step wedges from many frames within a given camera half-load. The net absolute accuracy of a given radiance measurement is estimated to be 20%.
Document ID
19770046412
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Poland, A. I.
(Los Alamos Scientific Lab. NM, United States)
Macqueen, R. M.
(Los Alamos Scientific Lab. NM, United States)
Munro, R. H.
(High Altitude Observatory Boulder, Colo., United States)
Gosling, J. T.
(California, University Los Alamos, N. Mex., United States)
Date Acquired
August 8, 2013
Publication Date
April 1, 1977
Publication Information
Publication: Applied Optics
Volume: 16
Subject Category
Astronomy
Accession Number
77A29264
Funding Number(s)
CONTRACT_GRANT: NAS5-3950
Distribution Limits
Public
Copyright
Other

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