[time-nuts] A loran-C signal movie...
phk at phk.freebsd.dk
Tue Nov 25 22:46:05 UTC 2008
I thought some of you might get a kick out of this too:
I set up a shell-script to snapshot the tek4014 window from my
"AducLoran" receiver every few seconds.
The I managed to get ImageMagick to turn a selection of those images
into an animated gif:
The first 100 frames are 4-5 seconds apart, thereafter the rate drops
to 1 frame for each minute.
Here is an initial allan deviation for the receiver, relative to
a free-running FRS-10 Rb:
The red trace is the averaged off-the-air measurements by the receiver,
the green trace has the linear frequency drift of the Rb removed.
More about the project here:
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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