Accession Number:

AD0827078

Title:

LARGE-ARRAY SIGNAL AND NOISE ANALYSIS; TRAVELTIME ANALYSIS FOR LASA

Descriptive Note:

Special scientific rept. no. 15

Corporate Author:

TEXAS INSTRUMENTS INC DALLAS SCIENCE SERVICE DIV

Personal Author(s):

Report Date:

1967-12-20

Pagination or Media Count:

108.0

Abstract:

The report investigates practical aspects of generating high- resolution wavenumber spectra using subarray outputs of the Montana LASA. Especially studied are the variability of traveltime anomalies as a function of wavenumber, spectral window effect on crosspower estimates due to moveout across the array, and tradeoffs involved in a finite-length transform of array data. From this investigation, it is concluded that current data are insufficient to define a scheme adequately to correct wavenumber spectra calculations for traveltime anomalies. Also, because subarrays on the E and F rings of LASA generally exhibit larger traveltime residuals and less waveform similarity than do subarrays of the inner rings, subarrays on the E and F rings will not be included in high-resolution f-k spectra calculations.

Subject Categories:

  • Seismology
  • Explosions
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE