Hello Time Nuts,
I thought this would be of interest to the group:
http://www.ft.com/cms/s/0/fadf1714-940d-11e3-bf0c-00144feab7de.html
Regards,
John W.
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Perhaps my browser is too conservative but it looks like you have to be a
subscriber to read the Financial Times article.
Here's one about eLoran vs. GPS jammers which has some security
implications.
http://nakedsecurity.sophos.com/2014/02/13/revamping-an-old-technology-to-jam-the-gps-jammers/
You should not denigrate PhotoMultiplier tubes.
They are virtually perfect, almost noiseless, detectors. With the right
photocathode, they are capable of QEs 50%, spectral response from the VUV
to near IR, and dark counts 1 PPS, with maximum count rates 10 MPPS.
Thay can easily have current gains
On Fri, Feb 14, 2014 at 8:14 AM, Paul tic-...@bodosom.net wrote:
Perhaps my browser is too conservative but it looks like you have to be a
subscriber to read the Financial Times article.
Here's one about eLoran vs. GPS jammers which has some security
implications.
There was a lot of work done on GEN III NV devices. They use GaAs
photocathodes w/ high QE. The same photocathode works for PMTs.
Detecting single photons is duck soup w/ a PMT. With modest cooling, you
can get the dark count down to 1/minute or better.
-John
=
On Fri, Feb
On Fri, Feb 14, 2014 at 7:45 AM, J. Forster j...@quikus.com wrote:
You should not denigrate PhotoMultiplier tubes.
They are virtually perfect, almost noiseless, detectors. With the right
photocathode, they are capable of QEs 50%, spectral response from the VUV
to near IR, and dark counts 1
Hello Again Time Nuts,
Sorry - first time I went to that site it was 'OK' but then I see it
requires registration - here's the story:
Regards,
John W.
February 13, 2014 7:22 pm
GPS pioneer warns on network's security
By Sam Jones and Carola Hoyos
[image: Europe --- This image is a composite
Thanks, John
It's quite clear that at least one far eastern nation, need I name it?
is going for domination of space, meanwhile feinting with such useless
stuff as old rotted carriers and the like, nothing up my sleeve, trick
the first, meanwhile building its own gps fleet, hardened i'll bet, and
