Ambient noise station-correlation spectra for USArray stations

G15A-TA secondary stations.

D13A-TA D14A-TA D15A-TA E13A-TA E14A-TA E15A-TA F11A-TA F12A-TA F13A-TA F14A-TA
F15A-TA G11A-TA G13A-TA G14A-TA H11A-TA H12A-TA H13A-TA J12A-TA J13A-TA K14A-TA
BOZ-US HLID-US