I’m not any kind of expert but the idea of using lasers or ultrasound to detect moving particles in the air to determine velocity has been in my head for a few years. The issue of there not being anything downrange to pick up always seemed to be a stopblock though. The thought once occurred to me that one could use a subsonic suppressed single shot weapon like a .22 or maybe something heavier to kick up dust at a mid range to give you something to detect, provided the operational area/parameters allowed for such a thing without risk to the shooter. There could be something developed for max ordinate like a miniature chaff round, of type and appearance to escape detection from down range, that could be sent up, sighted through your sensor package and a high level wind range given. I think the Israelis were working on downrange laser detection of wind carried material for wind speed detection but I don’t know what became of it, unless it’s what’s being referenced above?
