Accession Number : ADA183676

Title :   Autoregressive Methods for Spectral Estimation from Interferograms.

Descriptive Note : Rept. for 1 Oct 84-30 Sep 85,

Corporate Author : UTAH STATE UNIV LOGAN CENTER FOR SPACE ENGINEERING

Personal Author(s) : Richards,Edward N ; Delay,Susan H ; Grieder,William F

PDF Url : ADA183676

Report Date : 19 Sep 1986

Pagination or Media Count : 57

Abstract : This report is an evaluation of an Autoregressive (AR) method of spectral estimation, which has been incorporated into an interactive software package designed specifically for processing interferograms. The evaluation of this method of spectral estimation is based on a comparison of AR spectral estimates with those of a conventional Fourier transform method. The principle conclusions from this evaluation are: 1) that for high SNR this AR method offers significant advantages in resolution of low line density spectra which could permit shortening the interferometer drive length by at least a factor of three, and 2) for high line density spectra and high SNR one may achieve a factor or two over Fourier methods because it is not necessary to apodize the interferogram. keywords: Maximum entropy, Autoregressive interferograms, Fourier.

Descriptors :   *SPECTRA, *INTERFEROGRAMS, COMPUTER PROGRAMS, DRIVES, ENTROPY, ESTIMATES, FOURIER ANALYSIS, FOURIER TRANSFORMATION, HIGH DENSITY, INTERACTIONS, INTERFEROGRAMS, INTERFEROMETERS, LENGTH, LINE SPECTRA, LOW DENSITY, PROCESSING, SPECTRA

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE