Accession Number : AD0800364

Title :   REMOTE SIGNAL/NOISE TESTS IN POLARIZED NOISE.

Descriptive Note : Scientific rept.,

Corporate Author : TELEDYNE INDUSTRIES INC ALEXANDRIA VA EARTH SCIENCES DIV

Personal Author(s) : Griffin, James N.

Report Date : 16 SEP 1966

Pagination or Media Count : 37

Abstract : Rectilinear motion detectors are useful in the study of teleseismic depth phases. A detector has been developed which has controllable sensitivity to the phase and direction of ground motion. Input-output S/N tests were conducted on the detector, using as test data a P phase which had been inserted into signal-generated noise at several S/N ratios. In noise which was polarized in a different direction from the signal, the detectors with high directional sensitivity provided large S/N gains at high input S/N levels. Gain decreased rapidly as input S/N levels fell to 0 db and lower. In noise polarized in the same direction as signal, S/N gain was low. (Author)

Descriptors :   (*SIGNAL-TO-NOISE RATIO, POLARIZATION), (*SEISMOMETERS, DETECTORS), NOISE, MEASUREMENT, SEISMIC WAVES.

Subject Categories : Seismology

Distribution Statement : APPROVED FOR PUBLIC RELEASE