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Proceedings Paper

Deconvolution of Low Frequency Information From Signals Obtained With Ac Coupled Sensors
Author(s): Stephan D. Price
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Paper Abstract

The general considerations for a survey instrument are discussed. The infrared telescopes used by AFGL for the sky survey are ac coupled to minimize dynamic range requirements, scan and 1/f noise. However, this high pass filtering also attenuates signals from extended celestial sources. The process by which the effects of this filtering may be deconvolved from the data is briefly described. The problem at this stage is the familiar one of separating unwanted background and noise from the signal of interest. Reasonable separation of the the extraneous signal variations from the higher frequency signal of interest was obtained by sequentially smoothing the data in two coordinates over an interval of about one degree with a non-linear filter. A low resolution map which clearly shows large scale diffuse emission is a direct result of this smoothing. It was found possible to improve the resolution of the mapping with further processing to as high as the uncertainties associated with detector size and uniformity will allow.

Paper Details

Date Published: 21 November 1980
PDF: 7 pages
Proc. SPIE 0264, Applications of Digital Image Processing to Astronomy, (21 November 1980); doi: 10.1117/12.959796
Show Author Affiliations
Stephan D. Price, Air Force Geophysics Laboratory (United States)

Published in SPIE Proceedings Vol. 0264:
Applications of Digital Image Processing to Astronomy
Denis A. Elliot, Editor(s)

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