If you look at the pictures here
http://www.orbital.com/NewsInfo/Publications/Galaxy_Fact.pdf
the satellite on the right has things sticking out the bottom, in the
back corner, that are missing on the others and that look a lot like
the antennas on GPS satellites. The WAAS satellite is also 350 pounds
heavier than the other two even though the C-band payload is identical
on all three, so it seems like there could be a fair amount of extra
stuff added for WAAS support.
Dennis Ferguson
_______________________________________________
Thanks, Dennis. The antennas don't surprise me, as they would need to
produce a near-whole-disk coverage at a similar ground received power level
to the GPS satellites. That extra weight /does/ sound a lot if it were
"just" a simple transponder for earth produced information. Here in Europe
was have three EGNOS sources (all on other satellites, I believe), and I
don't believe they play any part in actual position fixing, but they do
provide extra information enabling the fix to be refined.
Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay...@blueyonder.co.uk
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
