[time-nuts] The Demise of LORAN (was Re: Reference oscillator accuracy)

Didier Juges didier at cox.net
Mon Nov 16 02:11:13 UTC 2009


The commercial jammers referred to in an earlier post advertise 10 to 45m or
so range, with significant power levels and battery life measured in a few
hours. Considering that these devices are illegal to begin with, I have to
assume that these figures are probably optimistic (optimistic advertisement
is probably the least of their concern.)

If I were a pilot, I would probably be more worried about the kid playing
with his Nintendo in 15A (or his father trying to retrieve his email with
his GSM smart phone) during approach than a jammer on the ground.

Didier

> -----Original Message-----
> From: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] On Behalf Of J. Forster
> Sent: Sunday, November 15, 2009 6:38 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] The Demise of LORAN (was Re: 
> Reference oscillator accuracy)
> 
> Even 10 KM is pretty useful. If the thing were solar powered 
> with a supercap "battery" it could easly transmit for say 2 
> minutes per hour w/ significant power. It'd be hard to find 
> if the on times were generated by a multiple fedback CMOS 
> shift register.
> 
> -John
> 




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