Publication:
An investigation of digital spectral analysis programs and computer methods utilized at the Naval Postgraduate School in the analysis of high frequency random signals.

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Authors
McKendrick, John DeMille
Subjects
turbulence analysis
analog-to-digital data conversion
digital data processing
fast-Fourier transform
power spectral density
spectra plotting
cross spectral density
time series analysis
Advisors
Boston, Noël E.J.
Date of Issue
1972-03
Date
March 1972
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The digitizing procedure used at the Naval Postgraduate School was investigated for possible sources of noise and other errors. Signals of known form were digitized through the Analog-to Digital Hybrid computer system (Ci 5000/XDS9300) . Similar signals were generated by digital programs on the IBM 36O/67. The resultant signals were analyzed by the computer programs UBCFTOR, which computed the Fourier coefficients of each block of data, and by UBCSCOR, which computed the power spectra of the signals. The power-spectral plots of the computer-generated signals were compared with the power-spectral plots of digitized signals. The analog-to-digitital process appeared to be relatively noise free. To further test the system, atmospheric temperature and wind velocity signals were digitized and analyzed under UBCFTOR and UBCSCOR. Plots of the time-varying spectra of these signals compared favorable with results obtained at other digitizing facilities.
Type
Thesis
Description
Series/Report No
Department
Oceanography
Other Units
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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