If an EMP takes out GPS, there’s a good chance our ham gear and computers will be gone too… along with the power grid.
Some of us who still have some hollow-state gear in reserve might still be able to get on the air if we can get electricity, so CW will probably be the mode-of-the-day. Propagation will likely be poor too as a result of the EMP and nuclear explosion. Personally, if the bomb is heading towards me, I plan on trying to be directly underneath it. Mike WM4B From: Dave Corsello [mailto:kd2...@gmail.com] Sent: Thursday, December 7, 2017 6:27 PM To: WSJT software development Subject: Re: [wsjt-devel] DXPedition System Clock Sync Granted. This would be one relatively small detail. But assuming that a number of other details are in order, including backup QRP gear stored under sufficient EMI shielding, it would be great to have such a reliable form of communication available under worst-case conditions. Sorry, this is not a very up-beat subject, although for me, it’s pretty exciting. I’m ready to meet my Maker, so everything else is adventure. Dave KD2JIP From: Gil Baron W0MN Sent: Thursday, December 7, 2017 6:06 PM To: WSJT software development Subject: Re: [wsjt-devel] DXPedition System Clock Sync If we get GPS knocked out by emp we have a lot more to worry about than the WSJT community. iPad Gil W0MN Hierro Candente Batir de Repente 44.08226 N 92.51265 W > On Dec 7, 2017, at 4:49 PM, Mike Besemer <mwbese...@cox.net> wrote: > > Remember that in the U.S., automatically controlled beacons are not legal > below 28.0 MHz. > > It would be much more efficient to encode time data within existing QSO data > in the datastream. > > Mike > WM4B > > > > From: Dave Corsello [mailto:kd2...@gmail.com] > Sent: Thursday, December 7, 2017 5:39 PM > To: WSJT software development > Subject: Re: [wsjt-devel] DXPedition System Clock Sync > > Ria, > > Yes, I just ordered a cheap GPS receiver. I’m looking forward to using it > with my Windows 10 tablet. > > Two of my primary interests are emergency communication and finding ways to > function as off-gird as possible. To me, GPS is part of the grid, as > vulnerable to failure as any other part. I’m knocked out by WSJT’s ability > to perform under adverse conditions, and would love to see it freed from its > dependence on local access to NTP. A network of WSJT “time servers” would be > a grid of sorts, and would be tied to UTC. But each beacon could be an > off-grid QRP rig, and NTP would not need to be available globally for it to > work. Actually, a WSJT beacon network that’s in sync with itself could > function independent of UTC. > > Of course, CW is as off-grid as it gets, although it requires an audible > signal… > > 73 > Dave > KD2JIP > > From: Ria Jairam > Sent: Thursday, December 7, 2017 4:32 PM > To: WSJT software development > Subject: Re: [wsjt-devel] DXPedition System Clock Sync > > Hi Dave, > > It was discussed and while it seems like a nice idea, I don't think it > gained much traction among the dev team. Either way, GPS seems to be > the most ubiquitous method to get time sync, as the satellites cover > most of the Earth and receivers are very cheap. Even my DSTAR HT has > one and I can access the GPS over bluetooth for time sync. > > 73 > Ria, N2RJ > >> On Thu, Dec 7, 2017 at 3:55 PM, Dave Corsello <kd2...@gmail.com> wrote: >> Thanks, RIa. I did see more than one thread on time sync in which GPS was >> discussed. I’m new to the list and was trying to contribute to a thread >> from November, in which they were discussing alternatives to GPS. I didn’t >> see any suggestions regarding a WSJT mode for time sync. Maybe I didn’t >> look hard enough or maybe it’s too outlandish an idea. >> >> >> >> Given the current state of geo-politics, I think the probability of GPS >> being knocked out by EMP is greater than zero. So I thought it was >> worthwhile to continue the discussion. >> >> 73 >> >> Dave >> >> KD2JIP >> >> >> >> From: Ria Jairam >> Sent: Thursday, December 7, 2017 3:25 PM >> To: WSJT software development >> Subject: Re: [wsjt-devel] DXPedition System Clock Sync >> >> >> >> I think this was discussed before and the consensus was that they >> >> could just use a GPS receiver instead. >> >> >> >> 73 >> >> Ria, N2RJ >> >> >> >>> On Thu, Dec 7, 2017 at 3:18 PM, Dave Corsello <kd2...@gmail.com> wrote: >>> >>> Would it make sense to develop a new WSJT mode for time sync? One >> >>> implementation might be through dedicated stations that grab UTC via NTP >>> and >> >>> broadcast it, and an option in WSJT software to listen for the beacon, >> >>> calculate an offset between local system time and the received code, and >> >>> apply it to other modes during the current session. Not a lot to ask, >> >>> right? >> >> >> >>> >>> ------------------------------------------------------------------------------ >> >>> Check out the vibrant tech community on one of the world's most >> >>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> >>> _______________________________________________ >> >>> wsjt-devel mailing list >> >>> wsjt-devel@lists.sourceforge.net >> >>> https://lists.sourceforge.net/lists/listinfo/wsjt-devel >> >> >> >> >> ------------------------------------------------------------------------------ >> >> Check out the vibrant tech community on one of the world's most >> >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> >> _______________________________________________ >> >> wsjt-devel mailing list >> >> wsjt-devel@lists.sourceforge.net >> >> https://lists.sourceforge.net/lists/listinfo/wsjt-devel >> >> >> >> >> ------------------------------------------------------------------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> _______________________________________________ >> wsjt-devel mailing list >> wsjt-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/wsjt-devel > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel > > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
