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Alignment techniques required by precise measurement of effective focal lengthThe characteristics of false color imagery produced by instrumentation on earth resource mapping satellites are examined. The spatial fidelity of the imagery is dependent upon the geometric accuracy (GA) and the band-to-band registration (BBR) with which the telescope instrument is assembled. BBR and GA require knowledge of telescope effective focal length (EFL) to one part in 10,000 in order that the next generation of earth mappers be able to carry out their missions. The basis for this level of precision is briefly considered, and a description is given of the means by which such precise EFL measurements have been carried out. Attention is given to accuracy requirements, the technique used to measure effective focal length, possible sources of error in the EFL measurement, approaches for eliminating errors, and the results of the efforts to control measurement errors in EFL determinations.
Document ID
19810055177
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Wise, T. D.
(Santa Barbara Research Center Goleta, CA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1980
Subject Category
Optics
Report/Patent Number
SAND-75-0287C
CONF-800719-2
Meeting Information
Meeting: Seminar on Optical alignment
Location: San Diego, CA
Start Date: July 29, 1980
End Date: July 31, 1980
Accession Number
81A39581
Funding Number(s)
CONTRACT_GRANT: NAS5-24200
Distribution Limits
Public
Copyright
Other

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