On 11/15/12 5:33 AM, David wrote:
On Thu, 15 Nov 2012 05:02:54 -0800, Jim Lux <[email protected]>
wrote:
On 11/15/12 4:30 AM, David J Taylor wrote:
i just used this to with a raspberry pi with good success.
https://www.adafruit.com/products/746
james
===============================================
It looks idea, James, but ... with the 15 mm square patch antenna it
seems deaf compared to similar devices with 25 mm antennas. Perhaps
understandable, but I just bought one and it's been sitting for well
over an hour and not yet acquired lock. The device I bought from China,
sitting next to it, has been happily locked for that whole period. (As
I'm running a test I don't want to unlock the other device). Just a
caveat for someone considering using these devices indoors - size matters!
25 mm antenna device:
http://www.satsignal.eu/ntp/NEO-6M-under-initial-test.jpg
http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html
Cheers,
David
ALl good ideas.. but I was looking more for something a bit more
packaged.. like a hockey puck with wires coming out.
I picked up a used Garmin GPS18-5Hz hockey puck to play with and after
updating the firmware, have gotten good results with the cable going
out a window and the unit sitting on the lower edge of the roof. Its
5 pulse per second output has 60ns of resolution according to the
Racal Dana 1992 I repaired implying about a 16.6 MHz timing clock.
That's the kind of thing I'm looking for.. or the Synergy TrakPuck ...
or one of those pods that came with mapping software 5-10 years ago.
I wonder if there's a new version of the GPS18, since I need something
that is available off the shelf (and likely to remain so for at least
2-3 years)..
Is there a timing output on the GPS16x? (or are the serial messages
synchronized in some way)
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