Re: Motorola microwave alarm

On Jun 21, 11:32�pm, "m...@sushi.com" <m...@sushi.com> wrote:

<http://www.osti.gov/bridge/servlets/purl/10187166-0F6rlF/native/
10187166.pdf>

They claim a 8KM range for a person on foot. I suspect more range if
the target wears a tin foil hat. The report is 16 years old, so you
have to assume this is the low end of today's capabilities.


Yeah, it's sort of old school stuff these days,  but an interesting
report.  It seems to be a more modern variant of the AN/PPS-5B Ground
Surveillance Radar Set.

There's a great typo on page 10, where it lists the RF carrier as
being 9.46 MHz.  The ability to do personnel radar at that frequency
was very impressive, until it later becomes obvious the actual
frequency is 9.46 GHz.  Lots of problems with this unit, in that it
must be used in cleared, flat areas (can't see through brush), and the
narrow angle of coverage means it has to be physically scanned.  The
report notes  this could allow someone with a "very special" detector
to monitor the beam and only move when the beam was absent.  You can
probably pick up the necessary detector these days at Radio Shack.
Also being doppler, it only works for targets moving at a decent
speed.

The discussion of the units use around various DOE sites (including
the NTS) was amusing.  No mention of certain non-DOE sites.

For a taste of more modern personnel surveillance radars, have a look
at:
http://security.bfioptilas.se/Perimetral+Surveillance+Radar-30.htm