Generation of Causal Time Series arising from Spectra of Narrow-Band Asymmetric Peaks.

Details Generation of Causal Time Series arising from Spectra of Narrow-Band Asymmetric Peaks. Generation of Causal Time Series arising from Spectra of Narrow-Band Asymmetric Peaks.

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sp31a04l&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SP31A-04

Astronomy and Astrophysics

Astronomy

7522 Helioseismology

Scientific paper

Synthetic time series with known spectral properties are frequently used in the development of analysis techniques, most commonly by assigning random phases to an amplitude spectrum with the desired properties - an approach with significant limitations. For narrow band peaks of the sort encountered in helioseismology, a simple auto-regressive [AR] description yields a physically realisable signal quite naturally. In fact, a second-order AR model is just a discrete representation of the second-order differential equation giving rise to the modes. It is now widely appreciated that the profiles of helioseismic resonances are significantly asymmetric, and this can be incorporated into the generation of artificial time series quite simply by extending the AR approach to include moving averages [MA] excitation. This ARMA model provides an immediate source of the correlated noise that has been invoked to describe the asymmetries. The NSO is sponsored by the National Science Foundation through a cooperative agreement with the Association of Universities for Research in Astronomy, Inc.

Affiliated with

Also associated with

No associations

Rating

Generation of Causal Time Series arising from Spectra of Narrow-Band Asymmetric Peaks. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Generation of Causal Time Series arising from Spectra of Narrow-Band Asymmetric Peaks., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Generation of Causal Time Series arising from Spectra of Narrow-Band Asymmetric Peaks. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1279101