[time-nuts] LORAN-C questions...

Brooke Clarke brooke at pacific.net
Sun Mar 6 16:31:10 EST 2005

Hi Brian:

I've compared the 2100F against a PRS10 Rb source disciplined by GPS and 
the 2100T against a FTS4060/S24 (but not quite set properly), for the 
latter see:  http://www.pacificsites.com/~brooke/FTS4060.shtml
and the plot at: http://www.pacificsites.com/~brooke/pdf/sn1227_CF570.pdf
The 2100F/T are at:  http://www.pacificsites.com/~brooke/A2100F.shtm

I never could make sense of the offset value (i.e. Track Data 4) on 
either receiver.  The time offset value (O/FS) in microseconds has 
meaning, but I don't think the measuring time for the Track Data 4 is 
known.  I'm fairly sure it is NOT the loop integration time set by Track 
Data 6.

I'm using the AMRAD active whip antenna mounted at ground level with a 
ground stake and ground wire.  The Middletown, CA 99400 station is less 
than a degree away.


Brooke Clarke, N6GCE

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

wa1zms at att.net wrote:

>I have an Austron 2100F running and have been
>noting the reported frequency error against one
>of my cesium standards.
>What I note is the error value (as reported by
>the 2100F) always "bottoms out" to a few parts in
>10^12th around 3pm and 2am local time.  All other
>times the error is parts in 10^11th.
>I assume this is due to a mix of skywave and ground
>wave propagation.  I'm currently building an active
>E-field antenna to substitute for the 75m dipole I'm
>using right now.  I'm tracking my closest LORAN
>station which is Carolina Beach, NC.  About 400km away.
>Are my observations typical of LORAN multi-path?
>Thanks in advance.
>-Brian, WA1ZMS
>time-nuts mailing list
>time-nuts at febo.com

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