SIGINT planes vs. radioisotope mapping

[BobCat]

From: "Tim May" <timcmay at got.net>

> I certainly never implied in any way that a simple G-M tube would be
> useful for this. Implicit in my radioistope mapping comment was that a
> gamma ray spectrometer would be used.

> The rest of the assembly, even 20 years ago, was mostly portable: the
> germanium detector head, some preamps and pulse-height analyzers, and a
> multichannel analyzer. Most of this stuff is now done on laptops, the
> MCA and analysis software part. Without researching this on the Net, I
> would thus conjecture the entire gamma ray spectrometer could fit in a
> small carry-on case, using a small dewar.

http://www.giscogeo.com/pages/radgf260.html

DIMENSIONS AND WEIGHT: 27x13x18 cm, 2.8 kg

There's a bunch more

http://www.alltheweb.com/search?cat=web&cs=utf-8&type=phrase&q=portable%20gamma%20ray%20spectrometer%20