From: [EMAIL PROTECTED] Subject: Re: [time-nuts] Progress of my HP Z3801A -- Ooops! Date: Wed, 30 Aug 2006 22:59:07 +0200 (CEST) Message-ID: <[EMAIL PROTECTED]>
> On Wed, August 30, 2006 22:23, Magnus Danielson said: > > > The current state is on: > > http://rubidium.dyndns.org/gpsdata/ > > > > Should this > > "Satellites(Tracking/Visible): 6/3" > > be read as; Tracking 6 SVs, 3 more should be visable over the 10 deg > horizon mask, but are not used now? Yes. Those numbers are also quite typical. I have sometimes have 12 or ever 13 visible satellites. Many are however lo-sniffers, so they are either in the rising or in the decending. I have considered making a signal-strength map of my sky, through the continous logging of signal-strength versus Asimuth/Elevation angle, and then use that to actively remove satelites which is in nonfavourable positions from the list of available satellites. Doing that actively I could possibly have a lower horizontal mask as I effectively punch out a 2D mask in its place. It doesn't take that much of programming to do. Some care must however be taken to observe the variation of signalstrength in each sector. A little more advanced variant would look at how pseudo-ranges changes in different directions and set the 2D elevation mask such that a maximum pseudo-range error is accepted, again will variations be necessary ingredience for correct result. CPU cycles doesn't come back, so waste them while you can! Cheers, Magnus _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
