Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by FENG, C.-C. Articles by TENG, T.-L. Search for Related Content GeoRef GeoRef Citation

An error analysis of frequency-time analysis

DEPARTMENT OF GEOLOGICAL SCIENCES UNIVERSITY OF SOUTHERN CALIFORNIA, LOS ANGELES, CALIFORNIA 90089

Abstract

The temporal resolution and accuracy of frequency-time analysis (FTAN) as applied to surface-wave dispersion analysis are examined for a period range from 10 to 200 sec. The constant relative bandwidth filter (Dziewonski et al., 1969), optimum bandwidth filter (Inston et al., 1971), and display-equalized filter (Nyman and Landisman, 1977) are carefully examined with respect to their adequacy of application over a broad period range. Among these Gaussian filters, the optimum bandwidth filter gives a better performance for relatively short-period (less than 50 sec) dispersion measurement. To measure surface-wave dispersion for a broad period range, a "matched-filter FTAN" technique is introduced by modifying the "residual dispersion measurement" technique (Dziewonski et al., 1972). A detailed numerical analysis is made on this new technique; the result demonstrates a significant improvement on both the resolution and the accuracy of surface-wave dispersion data extraction over a broad period range up to at least 200 sec.

Footnotes

^* Present address: Shell Oil Company, P.O. Box 527, Houston, Texas 77001.

This article has been cited by other articles:

				Y. ZENG, T.-L. TENG, and K. AKI Surface-wave mapping of the crust and upper mantle in the Arctic region Bulletin of the Seismological Society of America, October 1, 1989; 79(5): 1520 - 1541. [Abstract] [PDF]