Could it be new Thz radars being tested? They could fit in a large drone easily and be used for close flight formation(they have collision detection) and also t

Could it be new Thz radars being tested? They could fit in a large drone easily and be used for close flight formation(they have collision detection) and also to scan nearby terrain(they penetrate vegetation cover). https://e2e.ti.com/blogs_/b/industrial_strength/archive/2017/08/22/using-mmwave-technology-to-enable-sense-and-avoidance-in-drones https://e2e.ti.com/blogs_/b/industrial_strength/archive/2017... https://www.foxtechfpv.com/77ghz-millimeter-wave-obstacle-avoidance-radar.html https://www.foxtechfpv.com/77ghz-millimeter-wave-obstacle-av... (similar stuff costs about 300$, but these drones have probably something much more powerful and heavier, for military or government agencies) https://www.i-micronews.com/radar-to-spot-the-bad-guys-from-on-high/ https://www.i-micronews.com/radar-to-spot-the-bad-guys-from-... (China is developing something similar too) “We mounted a prototype on a drone and recently conducted test flights in Shaanxi province,” Li said. “A typical application of the radar in the future can be drone-based to help with large-scale detection of explosive-carrying terrorists or the placement of improvised explosive devices. This will be much more efficient and safer than deploying a lot of security personnel to do the same work.”