Accession Number : AD0759273

Title :   Special Data Collection Systems.

Descriptive Note : Final rept. 1 Sep 70-30 Sep 72.

Corporate Author : TELEDYNE GEOTECH GARLAND TEX

Report Date : 15 NOV 1972

Pagination or Media Count : 124

Abstract : The work performed under Project T/1703, Special Data Collection Systems Program, during the period 1 September 1970 through 30 September 1972 is described. Ten portable system teams were deployed to participate in the CANNIKIN experiment. The portable system instrumentation was modified to provide greater system sensitivity. The comparison study of the noise level recorded by long-period seismographs in two types of surface vaults indicates that the noise levels are virtually identical and no significant difference in noise level exists. A study of atmospherically-generated seismic noise as a function of depth was not able to be completed due to the existence of a component of pressure-related noise which generally exceeded the theoretical earth noise contribution. The basic characteristics of this pressure-related noise are described and an explanation for its origin offered. (Author Modified Abstract)

Descriptors :   (*SEISMOLOGICAL STATIONS, *DATA PROCESSING), (*UNDERGROUND EXPLOSIONS, DETECTION), SEISMOMETERS, NETWORKS, POWER SPECTRA, NOISE, EARTHQUAKES, NUCLEAR EXPLOSIONS, PORTABLE EQUIPMENT, INSTALLATION, RECORDING SYSTEMS, SENSITIVITY, MAINTENANCE

Subject Categories : Seismology
      Seismic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE