Hi > On Dec 19, 2020, at 8:34 AM, Magnus Danielson <[email protected]> wrote: > > Hi Bob, > > On 2020-12-19 00:15, Bob kb8tq wrote: >> Hi >> >> You can always cycle the power … :) > Comes to no relief for some cases, as they store state that keeps them > "killed". If it was as easy of cycle the power, it would not have been > an issue we discussed. >> =========== >> >> There also are the basic issues of 50 db gain antennas being attached to >> 20 db compatible modules. RF rich environments (even without Lightspeed …) >> will always be a challenge. Site design *is* part of this “mess”. > For sure. At the same time, we find sites which has numerous GPSes, each > installed in a separate install campaign by different vendors/companies > and "good enough" for that contract which didn't go into detail, so > there is that too. That is for sure part of the problem the cross-hair > is on. >> ======= >> >> At least from what I saw, *most* modules did a pretty good job of handling >> the >> stuff they saw. You could always jam them if you had enough power. Most of >> them recovered from that and went back to running correctly. >> >> Indeed, a device that provided timing on a per band / per system basis would >> probably have taken care of all the issues I saw. Back in the day, those >> devices >> …. not what you got in your low cost module …. > > It's not necessarily of doing per band or per system receivers increase > your PNT capability. It could in fact reduce it as you can not use > remaining signals and combine them. I made this very point that it would > be unwise to limit in such ways. That was also the result of an > IT-security analysis gone wrong, without considering some basic facts > and low-hanging fruit in making that more robust.
If the “per system / per band” timing information is all supplied up to the smarts in the unit, you would have 3 bands x 4 systems = 12 somewhat independent sources of timing to evaluate as part of your decision making process. Nothing is lost unless the decision making process rejects it. Bob > > Cheers, > Magnus > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
