Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010geoji.182..368f&link_type=abstract
Geophysical Journal International, Volume 182, Issue 1, pp. 368-374.
Astronomy and Astrophysics
Astronomy
1
Image Processing, Interface Waves, Site Effects, Wave Scattering And Diffraction, Crustal Structure
Scientific paper
Broad-band array studies frequently stack receiver functions to improve their signal-to-noise ratio while mapping structures in the crust and upper mantle. Noise may produce spurious secondary arrivals that obscure or mimic arrivals produced by P-to-S conversions at large contrasts in seismic impedance such as the Moho. We use a Hilbert transform to calculate phase-weights, which minimize the constructive stacking of erroneous signal in receiver function data sets. We outline this approach and demonstrate its application through synthetic data combined with different types of noise, a previously published example of signal-generated noise, and a large data set from the Sierra Nevada EarthScope Project. These examples show that phase-weighting reduces the presence of signal-generated noise in receiver functions and improves stacked data sets.
Frassetto Andy
Gilbert Henri
Jones Carleton H.
Owens Thomas J.
Zandt George
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