Occasionally I scour the Internet and forums researching counter thermal surveillance techniques, primarily just to see what new ideas people have as we are a while away from tech which would act as any type of cloaking device/reliable heat shield/jammer.
I came across these guys at tin hat ranch who have a few websites and a Facebook page on the subject, I’m sorry to see that their Facebook page has not been updated in some time so I’m really not sure if there was any substance in the tech they profes to have been developing. The website is of more interest.
What they do have is some decent information for those wanting to delve into this subject and gain a basic understanding on the difficulties and techniques needed to dissipate your heat signature.
A recommended read.