As far as the time sync issue is concerned, all that is
necessary is to have a good clock or watch with you. If your watch keeps
time within a few seconds per month (as my cheap Casio does), then just set it
to your home computer or WWV/CHU before you leave on your trip. Then
before you start operating set your computer clock to agree with your
clock. (Or listen to WWV from your portable location if you can).
Even if you get to be two or more seconds off, it will not make much difference
for MS or ISCAT, etc. For EME you have to be a little more careful, but 2
seconds will still work.
Obviously if you have a long operating session it would be
smart to double check the computer against your clock now and then to make sure
the computer is keeping time - maybe every 15-30 minutes.
73 & Happy roving.
I can’t help with the time sync issue while mobile – I know there are
solutions – but you might want to think twice about using JT6M. First of all,
JT6M is no longer present in the current version of WSJT (v.9). Almost
everybody is now using WSJT9, so JT6M is essentially obsolete. It has been
replaced by ISCAT, a similar but much better new mode optimized for weak
troposcatter, ionoscatter, and sporadic-E signals. It will also work for
meteor scatter on 6 meters when the pings are long enough to accommodate the
longer messages, but FSK441 is a much better choice for meteor-scatter
In the summer months, you will have both sporadic-E and meteor scatter
available to you at different times and in different directions. You have to
look and see what kinds of pings you are getting. Typically, longer-distance
stations (in the absence of sporadic-E) will have shorter, weaker pings, and
FSK441 is a better choice. I would plan on using FSK441 for meteor scatter and
ISCAT for constant signal amplitude propagation modes. When both modes are
present at once (fairly common during the summer months), ISCAT is a good
Sent: Wednesday, January 05, 2011 21:14
Subject: [wsjtgroup] GPS time roving?
What do people use to sync the pc clock when roving?
considering a short rove this summer to EN67 and assume no internet
I am also assuming JT6M mode...
John Watrous, K6PZB