Accession Number:

AD0875069

Title:

Nepenthe Study

Descriptive Note:

Technical rept.

Corporate Author:

TEXAS INSTRUMENTS INC DALLAS SERVICES GROUP

Personal Author(s):

• Laun, Phillip

Report Date:

1970-08-17

Pagination or Media Count:

26.0

Abstract:

The Nepenthe process and some simple modifications are investigated to determine their potential value as offline surface-mode signal-extraction techniques. The techniques have been applied to long-period noise, with a known signal added at various strengths. The processor output is compared with the known signal input to judge performance. The results are compared with the results of a bandpass filter.

Descriptors:

• *SEISMOLOGICAL STATIONS
• *UNDERGROUND EXPLOSIONS
• BANDPASS FILTERS
• DATA PROCESSING
• DETECTION
• DISTORTION
• EARTHQUAKES
• ELECTROMAGNETIC WAVE FILTERS
• INTEGRAL TRANSFORMS
• NOISE
• POWER SPECTRA
• RAYLEIGH WAVES
• SAMPLING
• SEISMOMETERS
• SIGNAL TO NOISE RATIO
• SPECTRUM SIGNATURES

Subject Categories:

• Seismology
• Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE