This was heard this morning between 0130-0210z on 27.636.0MHz USB or CW mode a series of musical "chimes" every two to three minutes for around 15 seconds duration. Signal was between 519 to 539 report.
Propagation from Australia was open to the USA and to Mexico/Central America with lots of Spanish chatter about.
So what are these chimes at regular intervals? Appreciate any answers or suggestions.