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High resolution multispectral camera system for ERTS A & BA very high resolution multispectral television camera system has been developed for NASA for use on the Earth Resources Technology Satellite (ERTS) program. There are three cameras in the system, each viewing the same area but operating in the blue-green, red, and near-infrared spectral bands. In the laboratory the cameras' limiting resolution is 4500 TV lines over the 25 x 25-mm image format of the Return Beam Vidicon (RBV). Analysis of typical ERTS scenes shows that actual contrast ratios will be much lower than those of laboratory test targets. A model was developed to predict the resolving power performance of the RBV camera under realistic conditions. To verify the model, tests were conducted using the RBV camera, a laser-beam image reproducer and a series of AF tribar test patterns of known values of contrast. As a more graphic demonstration, simulated multispectral images were generated using color-IR photographs from Apollo 9. The measured signal-to-noise, resolution, and spectral characteristics of the ERTS Flight A and Flight B three-camera systems are presented in conclusion.
Document ID
19740027360
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Miller, B. P.
Beck, G. A.
Barletta, J. M.
(RCA, Astro-Electronics Div., Princeton N.J., United States)
Date Acquired
August 7, 2013
Publication Date
October 1, 1973
Publication Information
Publication: Journal of Spacecraft and Rockets
Volume: 10
Subject Category
Instrumentation And Photography
Accession Number
74A10110
Funding Number(s)
CONTRACT_GRANT: NAS5-11621
CONTRACT_GRANT: NAS5-21904
Distribution Limits
Public
Copyright
Other

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