WWV (Radio Station)
en.wikipedia.orgDidn't know that WWV was used to track Sputnik:
https://en.wikipedia.org/wiki/WWV_(radio_station)#WWV_and_Sp...
> WWV's 20 MHz signal was used for a unique purpose in 1958: to track the disintegration of Russian satellite Sputnik 1 after the craft's onboard electronics failed...