[time-nuts] Loran - any good for timekeeping?

Brooke Clarke brooke at pacific.net
Fri Apr 21 14:04:15 EDT 2006

Hi Poul:

What is a "Frame rate cyclic averaging buffer"?  Is this where  you use 
a GRI generator to trigger sampling the incoming signal?

I've found that the quality of LORAN-C for timing depends on how close 
you are to the transmitter.  When in the 100 mile range the quality is 
equal to better than GPS, but when it's many hundreds of miles there's a 
lot of variation. 

I'm attaching a gif of the spectrum here from 0 to 200 kHz that goes 
with the web page:

Have Fun,

Brooke Clarke, N6GCE

w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml

Poul-Henning Kamp wrote:

>In message <robkimberley1$$.!&!AAAAAAAAAAAYAAAAAAAAAOYAZyOzV8ERq+
>LmT45ypI7CgAAAEAAAAHZ+5J10IM9Kj/tVlkBM7bkBAAAAAA==@btinternet.com>, "Rob Kimber
>ley" writes:
>>Long time since I played with a LORAN-C timing receiver, but the Austron
>>units were good to a microsecond. Interesting to know what the newer
>>technology can manage.
>For anyone wanting to play: the way forward is software defined radio:
>	http://phk.freebsd.dk/loran-c

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