That's a good point, and required time precision seems like it should be proportional to the velocity of the signal being investigated. I had some bad experienc

That's a good point, and required time precision seems like it should be proportional to the velocity of the signal being investigated. I had some bad experiences trying to use gps time for RDF, but that might not apply here. From https://www.usenix.org/legacy/events/mobisys07/full_papers/p113.pdf https://www.usenix.org/legacy/events/mobisys07/full_papers/p... > Our time synchronization approach yields errors signif- icantly less than 100 microseconds. As the sound travels about 3 cm in that time, time synchronization errors have a negligible effect on the system. Sounds like it? The anti-sniper systems I knew about already (Boomerang) are that single-site setup where time sync isn't a problem. The "Individual Gunshot Detector" sounds more like what you're describing. > The Individual Gunshot Detector (IGD) by Qinetiq consists of a shoulder-mounted unit with four acoustic sensors and a chest display that attaches to body armor. Still looking for more detail, but that sounds like a local ToA > pass up angles for triangulation type deal.