WWV and WWVH broadcast on a number of shortwave frequencies, which can be heard in many parts of the world.
WWV 和 WWVH 在许多短波频率上广播,可以在世界许多地方听到。
英语百科
WWVH
WWVH is the callsign of the U.S. National Institute of Standards and Technology's shortwave radio time signal station in Kekaha, on the island of Kauai in the state of Hawaii.
WWVH is the Pacific sister station to WWV, and has a similar broadcast format. Like WWV, WWVH's main function is the dissemination of official U.S. Government time, through exactly the same methods as found on WWV's signal.