Inexpensive Satellite Does the Job
Fri, 25 Jan 2002 16:46:50 -0500
On Friday, January 25, 2002, at 02:41 PM, Eugene Leitl wrote:
> On Fri, 25 Jan 2002, Dave Long wrote:
>> Redundant Array of Communicating
>> Kilobuck Satellites?
> You'll need a cloud of them. A cloud dense enough for 802.11b will be a
> definite space shrapnel hazard. Could put a few 100 MByte of flash FIFO
> inside, and route bursty during mutual flybys. Latency would suck,
Yep, we're talking 4 minutes or so at best for horizon-to-horizon on
flyby exchanges. Awesome for mail & news though.
> Given that you need a coordinate system, this seems to ask for digital
> pulse radio. You'd get a timing, a positioning service by mutual TOF
> triangulation and routing in one package, plus it is pretty white and
> on juice consumption.
Yeah. Or GPS for coordinates, doppler corrected, etc. It would be
cheaper/easier to implement than a straight pulse radio system because
of ubiquity, but not independent. And accurate enough. You'd always see
enough GPS birds. Heck, you could put 4 diversity receivers and run
pairs of antennas at opposite ends of the satellite and use software to
run a 4x2 diversity system that was tumbleproof.