4 ms·

I dont think they need to xmit beyond the baitphone making standard connections. Also there are apps for scanning and tracking celltower stength and mass-loggi

• diydsp 3y ago
  Would anyone who downvoted this please explain why they think this system needs any special permission from the FCC? Afaict, it's simply monitoring the interactions of its bait phone with towers.
  • callalex 3y ago
    The discussion is about FCC approval for the police to set up a rogue cell site, not FCC approval for this research project.
  • 14 3y ago
    Probably downvoting your comment about not needing a trunk full of hardware. “ These sensors have advantages over phones because they can contain specialized cellular scanning equipment and external antennas for farther reception ranges. While phone apps can see limited information on the tower currently connected to, our sensors scan the spectrum to measure hundreds of channels at a time and dozens of broadcast properties.” So there is an advantage over using a regular cell phone and an app.
• ajsnigrutin 3y ago
  Yes, there are (eg. wigle.net, mostly based around wifi, but also scans cell towers), but the data is very noisy, since every phone is different and everyone wears it differently (if you wear it higher, in a shirt pocket, you'll get higher signal levels than if you carry it in a pants pocket, or in your hand, or if you have an old iphone, if you're holding it in your left hand instead of the right).