Accuracy of the deterministic travel time retrieval from cross-correlations of non-diffuse ambient noise.
Measurements of long-range cross-correlations of ambient noise underlie acoustic noise interferometry, a promising technique for passive remote sensing of the environment. Previously established simple, exact relations between deterministic Green's functions and the cross-correlation function of perfectly diffuse noise do not necessarily hold for noise fields in the ocean and atmosphere. Here, the method of a stationary phase is applied to study the information content of the cross-correlation function of non-diffuse noise and to quantify the accuracy of passive measurements of the acoustic travel times.
Godin
Oleg A
OA
CIRES, University of Colorado, NOAA/Earth System Research Laboratory, DSRC, Mail Code R/PSD, 325 Broadway, Boulder, Colorado 80305-3328, USA. oleg.godin@noaa.gov