Brooke Clarke wrote:
Hi Bob:
Here's an interesting sidebar:
Precision Modeling for Orbit Determination
<http://www.aero.org/publications/crosslink/summer2002/02_sidebar2.html>
from the web page:
Orbit Determination and Satellite Navigation
http://www.aero.org/publications/crosslink/summer2002/04.html
I didn't know the Moon tides can change the elevation of LA by 40 cm!
oh yeah... all my GPS/geodetic friends at work say that once you get
down into the "sub-meter" range for gps (or sub 3 ns..same thing)
there's a whole raft of errors in that ballpark.. tidal displacement,
ionosphere, multipath, atmospheric refraction, etc.
They say it's sort of a "whack-a-mole" when you're trying to get better
than that (for non-differential measurements)
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