On Wed, 2018-02-21 at 18:41 -0800, shadow at shadowgard.com (via tml
list) wrote:
> With "civilian" grade sensors (as opposed to military or ISS grade)
> an air raft or larger "truck"/RV type vehicle doesn't emit enough EM
> to track easily.
>
> That leaves the CG & propulsion. What Piper called "lift & drive".
> They are probably detectable to some extent with grav sensors of
> some
> sort.

Even if there aren't enough emission to track. If your concern about
detecting locations of (camouflaged) fixed assets and his uses routes
across his land ten you may be able to average over months or years, of
sensor data.
--
Roger Gammans <xxxxxx@gammascience.co.uk>
Gamma Science