That right there tells me it’s not a permanent installation. I get 34.7 Ka band alerts every single time I pass Lackland AFB’s main entrances. Try to find out if there’s a donut shop or police station in the area, maybe alongside city hall or something. Helotes, TX, is like that, where cops park at their little miniature version of city hall a little ways off the road, but they don’t always turn off their radar, so sometimes driving by you’ll get Ka alerts that ramp up and back down again relatively quickly.Since it doesn't happen very often
No, that’s not the Doppler effect (or color shifting). When your detector sees the frequency change as you drive by a cop running radar, it’s because the signal your detector is seeing was (generally speaking) originally coming from the front facing radar antenna and after you pass them the strongest signal is from their rear radar antenna which is almost never tuned exactly the same as the front. So you might see 34.688 and then 34.714, but that is just the difference in the two antennas, NOT the Doppler effect.Can you see any doppler effect, freq goes up and or down. If so, when it changes direction, that's when your closest to the source.