[time-nuts] LORAN-C questions...
brooke at pacific.net
Sun Mar 6 16:31:10 EST 2005
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
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/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.
>time-nuts mailing list
>time-nuts at febo.com
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