Ambient noise station-correlation spectra for USArray stations

HLID-US secondary stations.

F11A-TA F12A-TA F13A-TA F14A-TA F15A-TA G10A-TA G11A-TA G13A-TA G14A-TA G15A-TA
H09A-TA H10A-TA H11A-TA H12A-TA H13A-TA I09A-TA I10A-TA I11A-TA J09A-TA J10A-TA
J11A-TA J12A-TA J13A-TA K09A-TA K10A-TA K12A-TA K13A-TA K14A-TA L12A-TA L13A-TA
M10A-TA M11A-TA M12A-TA M13A-TA