The chill ground would shield part of her heat signature.

There was no clear heat signature from the soldiers who had been present before.

Get heat signatures of the weapons to pick out the bad guys.

The body will build up a heat signature, which I might be able to trace.

The heat signature was still there, moving only a little.

I gave some thought to the possibility that it could have been reading my heat signature as well.

We look at it through a thermal scope but see no heat signature.

They might give off enough of a heat signature to be picked up.

Its heat signature was unlike those of the other rocks on the summit.

The heat signature of any tank which started its engine made an easy target.