Hi Brian! Hmmm... should I finish the thread before commenting...
The scenario has been discussed on the list before. There are publications from Zyfer (fei) on Waas timing with a fixed dish antenna. There is also a Fenton(Novatel) patent. -- Björn <div>-------- Originalmeddelande --------</div><div>Från: "Brian, WA1ZMS" <[email protected]> </div><div>Datum:2014-01-08 09:25 (GMT+01:00) </div><div>Till: Discussion of precise time and frequency measurement <[email protected]> </div><div>Rubrik: Re: [time-nuts] WAAS..... </div><div> </div>In this case the timing rcvrs are located all with in a 20km radius with fixed known surveyed locations. The problem is GPS jamming that happens at random times. So one "what if" idea is to use a WAAS enabled rcvr and a yet to be selected parabolic antenna to point at a given WAAS sat. The concept is to give all rcvrs a single common view for critcal timing use in a comm system. The ultimate goal is to try and reduce the number of times when full sky view GPS antennas are victims of GPS band interference. This is only a half-baked idea of mine (in my day-job) but wanted Time Nuts feedback to see if it has any merit at all. BTW, the system has Rb for hold-over when there are problems but the frequent system error alarms indicating hold-over events is what I/we would like to reduce. New SNMP traps could mask off the events, but being an RF guy.....I was thinking about a HW solution. :- ) -Brian, WA1ZMS/4 iPhone On Jan 7, 2014, at 11:05 PM, Magnus Danielson <[email protected]> wrote: > Brian, > > On 2014-01-08 02:25, Brian, WA1ZMS wrote: >> Hypothetical question.... >> For a given set of GPS timing grade receivers at multiple locations, is >> there any advantage by limiting allowable SVN numbers to only be the WAAS >> satellites? > > Well, if you do common view GPS comparision and is not into monitoring > observables separately (which is recommended), then there is some use for it, > as you configure the WAAS acceptance statically and only need to update it > once a new bird becomes available or one disappears. However, I wonder if > they are any good for that purpose anyway. > > So, in a more general way, I'd say no. > > More importantly, what are you trying to achieve? > > Cheers, > Magnus > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
