On 5/3/18 8:28 AM, Bob kb8tq wrote:
Hi
If you have a very good survey grade receiver and take a long enough data set,
yes you can
watch your location drift in some parts of the world. In most locations, fixes
a few years apart
would be a better bet.
Indeed this does get a bit far from the world of timing …… The distances
involved are nasty
small. Even for the location of your telescope when doing astronomical timing
observations,
they are unlikely to matter on a yearly basis. At some point the error is “to
small to matter” ….
Bob
Hit send too quick..
But more realistically, this is kind of a time-nutty sort of goal - to
be able to make measurements to a precision where you can match your
measurements to a nearby geodetic station with "official" measurements.
All the usual time measurement with GPS issues come into it - multipath,
the diurnal variations, solid earth tides.
It's what everyone says - getting to meters or 10s of ns - easy -
getting to tenths of ns or cm, significantly harder.
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