System for analyzing time-dependent phenomena

Details System for analyzing time-dependent phenomena System for analyzing time-dependent phenomena

1977-10-31

1979-02-06

Morrison, Malcolm A.

Boots, shoes, and leggings

356346, 364819, G01V 128, G01B 902

Patent

active

041387279

ABSTRACT:
A system for analyzing a time-varying phenomenon in which the latter is repetitively initiated to provide a train of repetitive output signals. A fast Fourier transform interferometer is provied to scan the train. Data corresponding to a selected temporal resolution element having the same selected time position following initiation of each signal are sampled and the samples coded to improve signal-to-noise ratio. The time relation between a selected retardation point in the interferometer and the initiation of each signal in a given train is successively shifted so as to produce a series of coded data, each datum corresponding to a resolution element occurring at the selected time position but at a different interferometer retardation. The selected data are then assembled in their time sequence to generate a synthetic interferogram. The synthetic interferogram, when inversely transformed, provides the spectrum of the phenomenon as it occurred during the temporal resolution element at the selected time position.

REFERENCES:
patent: 3989938 (1976-11-01), Auth
patent: 4086652 (1978-04-01), Mantz

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