Here is a valuable hint:
THERMAL imager cameras can only see SURFACE temperature…
Carry an umbrella…
You can disappear from imaging by walking under a bridge, opening umbrella and walking out underneath umbrella.
Now your shoes need to be well insulated or you will leave footprints. But the umbrella will cover your human form as it will take the temperature of the air around it.
My route to get out involves culverts, traversing pipelines, etc.
But with POTUS in charge, I got no reason to bail.
Been waiting for anyone to consider that this was originally a XXX image board and that may be why the first 3 "x's" are caps even if you don't type them that way…
We so amateur!
I have flir cameras. Tested.
The "emissivity" comes from SURFACE of objects only, and VERY few objects pass it thru like the germanium lenses of the imager cameras.
You CAN hide behind a piece of paper as long as you can hold it up shadowing yourself from the camera.
The umbrella comes in handy because it has a handle making your hands not "seen" while holding up an object.
Of course this works best with a camo-textured umbrella for irregularity of shape.
But TRY it. It works.
Being immersed in water is not good unless you STAY underwater unless the temperature is EXACTLY body temp.
Ask any CG or marine: Flir is very useful when looking for something in the water.
Now don't get me started on IR.
Not unless the ground is wet. Water is reflective, dirt grass and pavement does not "reflect"-
That's a good observation, but if you are on wet pavement you risk reflection, but at 45degree angle or so it would be an issue, overheat would not be a concern.
Metal and glass is highly reflective, but distorted image unless very flat and polished.
If you were to try to see inside a car with flir, the windows must be down or you will "see reflections" off the glass. (and unpainted metal)
The umbrella trick was all over youtube a while back. Its not new.