An interesting use of remote sensing (in its broadest terms), is the remote detection of lightning. Ground based sensors detect the characteristic radio waves from a lightning strike and can triangulate position with a network of sensors.
There are space based systems looking at the characteristic signature of lightning (there’s one on the TRIMM satellite I think)- but they do have to be looking at the right time.
The ground based sensors can only detect ground strikes (or near ground)- but these are the ones we are interested in!
The EUCLID network monitors Europe and they have great real time map of lightning activity: