-------- In message <be8c8c2f-217b-13b8-c9ce-c4150c549...@rubidium.se>, Magnus Danielson writes:
>It should be said that Kalman is kind of optimum for "white" noise >(what-ever that is), but we are far from white noise. Variants of Kalman >filters use noise-colour compensation of some sort, and that kind of >solves some of the issues. It does not fit the problem perfectly. This >is why time-scale algorithms is not directly Kalman filters but only >Kalman-esque to some degree. And that line of thought brings us to the stochastic-ish model which timing.com used on three 5071A and (three?) GPS's for the LORAN-C modernization. It's a very interesting paper and a very good idea, which works becuase their frequency source "bottoms out" in the MVAR plot: Frequency drift would mean you too many degrees of freedom. The only chance I see of doing something like that, would be a Rb where the lowest point on the MVAR plot is very close to 12h, or even better 24h, where the GPS is similarly optimal. Que the HP5065A... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
