I hear a Muni bus stop nearby, and a lot of voices at 3AM, so I am guessing it's near bars, maybe Mission street. Maybe a pole near enough to an apartment fire escape to ziptie a solar panel. I wonder if the timestamps are accurate enough for me to ride my bike down mission blasting a song, and check strava for where I was at that timestamp, then spot the spotter. Just for fun of course, not to post or dox.
Rather than relying on the bop spotter timestamp, you could play thirty-second snatches of different extremely obscure songs, on a schedule. When one of them turns up on the bop spotter, you know when you were passing it, to thirty seconds precision.