GEEZ, After all this discussion, it sounds like he should consider 2 Cs space devices, one main and a secondary.
Bill....WB6BNQ Poul-Henning Kamp wrote: > In message <[EMAIL PROTECTED]>, Magnus Danielson writes: > > > Once doppler bin and phase has been achieved for each PRN, [...] > > Just a footnote to say that as soon as you start receiving ephemerides > from the first sat, the search-space can be significantly reduced > if you care to do the, rather longhaired, trignometric math. > > >A sat based receiver must handle higher doppler offsets due to its > >higher speed, [...] > > While this is true for any non-geo-stationary satellite, it may not > be true for the project the initial poster talked about. > > As I remember it, he said that the mission would be in an earth-following > orbit, ie: in the same orbit as the earth around the sun, but > trailing it by some distance. > > Given that the distance in GPS terms is "vast" and furthermore that > the GPS orbits have a pretty steep angle relative to the earths > orbital path, I would expect the doppler offsets to be much smaller > than here on earth. > > Obviously, getting a position fix will suck with the worst > DOP seen to date, but a frequency fix should not be out > of the question. > > Obviously, the situation on the way to the final orbit is entirely > different, and there I would expect doppler to be totally out > of the lower end of the window. > > Remember to figure out the relevant relativistic corrections. > > Poul-Henning > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > [EMAIL PROTECTED] | 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 -- [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.
