Accession Number:

AD0483838

Title:

DIGITAL EVALUATION OF A CALIBRATION TECHNIQUE FOR MULTIPLE-ELEMENT ARRAY SYSTEMS

Descriptive Note:

Technical rept.

Corporate Author:

GEOTECH GARLAND TX

Personal Author(s):

• Huang, Y. T.

Report Date:

1965-12-08

Pagination or Media Count:

113.0

Abstract:

A quantitative analysis was made using techniques of digital spectral analysis. Two different approaches were compared -- statistical and deterministic. For the statistical approach, the computer program BLACKY, which computes power density spectra, was adopted. The program NUTRAN which uses the Numerical Transform Theorem Huang, 1965a was written for the CDC 160A digital computer and relies on a deterministic consideration of a time series. The agreement between the field calibration and the estimation of the magnification curve is good up to 1.5 cps, considering the simplicity of the mathematical model used in the study. Above this frequency, the scatter is quite erratic, and further refinement of the technique is desirable. Disagreement comes essentially from a lack of the high signal-to-noise ratio.

Descriptors:

• *SEISMOLOGY
• COMPUTER PROGRAMMING
• DIGITAL SYSTEMS
• MATHEMATICAL MODELS
• NOISE
• SCATTERING
• SEISMIC WAVES
• SEISMOGRAPHS
• SIGNAL TO NOISE RATIO

Subject Categories:

• Seismology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE