It is how power companies pinpoint a line break from the office. They send a pulse down the line and if the return waves bouncing off the various resistances changes, especially if the signal reflects off an open circuit, they can use the timing of the reflection to tell them where it is.
Thanks for that info.
Reflectometry, in northern New Mexico would be looked upon as another stupid idea the Gringos came up with and ignore it or shoot out power lines.