At 2:04 PM 12/11/94 -0800, Timothy C. May wrote:
This was an idea explored in detail by David Brin in 1990 in his novel "Earth." Video cameras are ubiquitous and have a major effect on casual street crime.
Hard to forget Brin's description of little old ladies sitting on their front porches, "armed" will full-sensoria headgear, laying in wait for extremely uneducated juvenile miscreants... Humorous.
This scenario is a likely way that "position escrow" will evolve, from a voluntary escrowing (incl. timestamping, etc.). "Those with nothing to hide" will agree to escrow their movements...this will exculpate them in suspected crimes, etc. A slippery slope.
In "City of Angles", Kim Stanley Robinson(?) talks about just a virtuous all-surveilling governmental "privacy" authority which is supposed "protect" your privacy from the police, who had to subpoena the information to get it.
On the topic of how these localizers actually work, I'm not at liberty to talk about the technology. It's novel, and uses a *lot* if digital signal processing. It doesn't use GPS and it's not a variant of cellular telephones.
I wonder if they're using an active/transponder system. That's what O'Niell's Geostar system was designed with in the early '80's. It would have put up cheaper sattellites and smaller earth transponders. The way you saved on transponder size was with very small bursts at very high power. You could send a signal to a small net of satellites 30,000 miles up with a box initially no bigger than an HP12C, and which would shrink more with time. The feds never liked Geostar 'cause they already had the passive/receiver GPS in the works, and they wanted to "amortize" the social cost of an essentially military (hence the requirement for a passive system) system on the backs of commerce. The only thing which saved GPS for mere mortals like us was the MIC's usual severe understimate of Grove's Law and the exponential cost effectiveness of integrated circuits over time. If my hunch is correct, with lots more local antennas, the power requirements of the tranceiver, and as a result, the tranceiver size, gets pretty small. Small enough to be worn on one's ankle. Cheers, Bob Hettinga ----------------- Robert Hettinga (rah@shipwright.com) "There is no difference between someone Shipwright Development Corporation who eats too little and sees Heaven and 44 Farquhar Street someone who drinks too much and sees Boston, MA 02331 USA snakes." -- Bertrand Russell (617) 323-7923