Hadamard Transform Spectrometer

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Abstract:

A Hadamard Transform Spectrometer is described. This multiplexing spectrometer is based on a 127 square cyclic Hadamard matrix. A resolving power of 0.1cm is achieved with a multiplexing gain factor of over five-fold in signal-to-noise ratio over use of a conventional single exit slit. A procedure for calibrating an infrared prism spectrometer plots drum numbers and wavelengths as ordinates against a trigonometric function of the index of the prism, as parameter and abscissae. The calibration data yields a straight line so only calibration data for two wavelengths is necessary.

Author(s):
Strong, John
Author Organization(s):
MASSACHUSETTS UNIV AMHERST ASTRONOMY RESEARCH FACILITY
Descriptive Note:
Final rept. 1 Jul 1970-30 Sep 1971
Pagination:
0034

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited. Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
UMASS-ARF-72-268, AFCRL-72-0085
Contract/Grant Number(s):
F19628-70-C-0296, ARPA ORDER-1366
Project Number(s):
AF-8692
Monitor Series:
72-0085, AFCRL
 Subject Terms
Joint Capability Areas:
JCA_6.3.3_Spectrum Management; JCA_6_Net Centric; JCA_6.3_Net Management; JCA_4.7.2_Installation Services; JCA_4.7_Base and Installations Support; JCA_1_Force Support; JCA_1.2_Force Preparation; JCA_6.4.1_Secure Information Exchange; JCA_1.2.3_Educating; JCA_3.2_Engagement; JCA_3_Force Application
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*INFRARED SPECTROPHOTOMETERS, MATHEMATICAL MODELS, INFRARED SPECTROSCOPY, SIGNAL TO NOISE RATIO, ABSORPTION SPECTRA, MULTIPLEXING, UPPER ATMOSPHERE
Field(s)/Group(s):
Atmospheric Physics, Test Facilities, Equipment and Methods, Optics
Keyword(s):
HADAMARD MATRIX
Report Date:
1971 Jan 01