Re: mapping in the sierras and places west
At 07:50 AM 11/12/2001 -0800, Major Variola (ret) wrote:
But you missed the mil 4-engine cargo-type plane towing a wire held in a trailing Y config by two mil copters flying in tight formation behind it, circling SF. Yes, I wouldn't have believed that was possible without having seen it.
Maybe they were mapping too.
They overflew San Jose and Santa Clara, too, headed westbound. What would a trailing wire like that measure or receive? My limited understanding of RF says it'd be good for picking up very low frequency emissions or transmissions - but I don't know of any sources of those that I'd expect to be of interest, other than those used by US subs and I'm sure they have better ways to pick those up. I'd have expected the interesting intel to be up at the other end of the RF spectrum, in the 800-2400 Mhz range with cell phones, cordless phones, pagers, 802.11b, etc. Any ideas? -- Greg Broiles -- gbroiles@parrhesia.com -- PGP 0x26E4488c or 0x94245961 5000 dead in NYC? National tragedy. 1000 detained incommunicado without trial, expanded surveillance? National disgrace.
Well, very low frequency could be used quite easily by almost anyone, in fact, the simplest, cheapest, most portable transmitters would use VLF and morse code. It's something any 10 year old kid could rig, and you get excellent propagation all over the world. Hams use VLF around campfires just for kicks. And if you used it in burst mode with a pre-recorded tape or digital input of an encrypted message sent in morse -- who knows? Greg Broiles wrote:
At 07:50 AM 11/12/2001 -0800, Major Variola (ret) wrote:
But you missed the mil 4-engine cargo-type plane towing a wire held in a trailing Y config by two mil copters flying in tight formation behind it, circling SF. Yes, I wouldn't have believed that was possible without having seen it.
Maybe they were mapping too.
They overflew San Jose and Santa Clara, too, headed westbound.
What would a trailing wire like that measure or receive? My limited understanding of RF says it'd be good for picking up very low frequency emissions or transmissions - but I don't know of any sources of those that I'd expect to be of interest, other than those used by US subs and I'm sure they have better ways to pick those up.
I'd have expected the interesting intel to be up at the other end of the RF spectrum, in the 800-2400 Mhz range with cell phones, cordless phones, pagers, 802.11b, etc. Any ideas?
-- Greg Broiles -- gbroiles@parrhesia.com -- PGP 0x26E4488c or 0x94245961 5000 dead in NYC? National tragedy. 1000 detained incommunicado without trial, expanded surveillance? National disgrace.
-- Harmon Seaver, MLIS CyberShamanix Work 920-203-9633 Home 920-233-5820 hseaver@cybershamanix.com http://www.cybershamanix.com/resume.html
Magneto-tellurics On Mon, 12 Nov 2001, Greg Broiles wrote:
At 07:50 AM 11/12/2001 -0800, Major Variola (ret) wrote:
But you missed the mil 4-engine cargo-type plane towing a wire held in a trailing Y config by two mil copters flying in tight formation behind it, circling SF. Yes, I wouldn't have believed that was possible without having seen it.
Maybe they were mapping too.
They overflew San Jose and Santa Clara, too, headed westbound.
What would a trailing wire like that measure or receive? My limited understanding of RF says it'd be good for picking up very low frequency emissions or transmissions - but I don't know of any sources of those that I'd expect to be of interest, other than those used by US subs and I'm sure they have better ways to pick those up.
-- ____________________________________________________________________ Day by day the Penguins are making me lose my mind. Bumper Sticker The Armadillo Group ,::////;::-. James Choate Austin, Tx /:'///// ``::>/|/ ravage@ssz.com www.ssz.com .', |||| `/( e\ 512-451-7087 -====~~mm-'`-```-mm --'- --------------------------------------------------------------------
participants (3)
-
Greg Broiles -
Harmon Seaver -
Jim Choate