Ambient noise station-correlation spectra for USArray stations

E03A-TA secondary stations.

A04A-TA A05A-TA B04A-TA B05A-TA B06A-TA C03A-TA C04A-TA C05A-TA C07A-TA D03A-TA
D04A-TA D05A-TA D06A-TA D07A-TA E04A-TA E05A-TA E06A-TA E07A-TA F03A-TA F04A-TA
F05A-TA F06A-TA F07A-TA G03A-TA G04A-TA G05A-TA G06A-TA H02A-TA H03A-TA H04A-TA
H05A-TA I02A-TA I03A-TA
NLWA-US