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MSDS sky reference and preamplifier studyThe major goals in re-designing the Multispectral Scanner and Data System (MSDS) sky reference are: (1) to remove the sun-elevation angle and aircraft-attitude angle dependence from the solar-sky illumination measurement, and (2) to obtain data on the optical state of the atmosphere. The present sky reference is dependent on solar elevation and provides essentially no information on important atmospheric parameters. Two sky reference designs were tested. One system is built around a hyperbolic mirror and the reflection approach. A second approach to a sky reference utilizes a fish-eye lens to obtain a 180 deg field of view. A detailed re-design of the present sky reference around the fish-eye approach, even with its limitations, is recommended for the MSDS system. A preamplifier study was undertaken to find ways of improving the noise-equivalent reflectance by reducing the noise level for silicon detector channels on the MSDS.
Document ID
19740011914
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Larsen, L. (Environmental Research Inst. of Michigan Ann Arbor, MI, United States)
Stewart, S. (Environmental Research Inst. of Michigan Ann Arbor, MI, United States)
Lambeck, P. (Environmental Research Inst. of Michigan Ann Arbor, MI, United States)
Date Acquired
September 3, 2013
Publication Date
March 1, 1974
Subject Category
Instrumentation And Photography
Report/Patent Number
ERIM-190110-1-F
NASA-CR-134222
Accession Number
74N20027
Funding Number(s)
CONTRACT_GRANT: NAS9-9784
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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