Accession Number:

AD0839119

Title:

LARGE-ARRAY SIGNAL AND NOISE ANALYSIS. NOISE SUPPRESSION BY LONG-PERIOD INFINITE-VELOCITY PROCESSORS

Descriptive Note:

Special scientific rept. no. 19

Corporate Author:

TEXAS INSTRUMENTS INC DALLAS SCIENCE SERVICE DIV

Personal Author(s):

• Wilkins, Wayne

Report Date:

1968-08-07

Pagination or Media Count:

27.0

Abstract:

Various infinite-velocity processing schemes were applied to two long-period noise samples recorded at the Montana LASA on 2 and 3 December 1966. Straight summation, multichannel signal extraction with an infinite-velocity signal model, and multichannel prediction filtering were applied to the presence of ambient noise. From the comparision of the various processing schemes, the 9- element array using multichannel filtering was found to be more effective than any straight summation for separating P-wave signals or surface modes widely separated from the noise and very nearly as effective as the 12-channel MCF.

Descriptors:

• *SEISMOLOGICAL STATIONS
• *UNDERGROUND EXPLOSIONS
• DETECTION
• ENERGY
• FOURIER ANALYSIS
• MONTANA
• NETWORKS
• NOISE
• NUCLEAR EXPLOSIONS
• PERFORMANCE(ENGINEERING)
• PHASED ARRAYS
• POWER SPECTRA
• SAMPLING
• SEISMOMETERS
• SIGNAL TO NOISE RATIO
• VELOCITY

Subject Categories:

• Seismology
• Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE