I'm trying to understand the behavior of a single laser pulse in a traditional airborne lidar.
I understand that the multiple return values are representative of the surface that reflected the initial pulse. However, does a single pulse from the laser, return each reflection individually to the sensor? Or does a single pulse from the laser continue through it's path, capturing each reflection along it's way until returning to the sensor?
So if a system can capture 300k pulses per second, are those 300k pulses released and captured? Or is that 100k +/- pulses returning 300k values?
Example photo: Does each disturbance in the waveform return it's own pulse to the sensor? If so, how the sensor understand the laser is continuing? And if that is also true, where does the energy come from to continue the pulse further?