Just to add one datapoint to the discussion, I am presently looking at a
professional grade receiver ($20k+++), tracking GPS/GLONASS/GALIELO/BEIDOU,
44 sats total as I type this. It reports standard deviation of the XYZ
coordinates of 0.76m, 0.44m and 1.3m respectively. It is not crystal clear
how
Be aware the some receivers report altitude in MSL (mean sea level) and others
use AGL (height above ground level). Depending upon where you are and the
conversion model, there can be over 100 meters difference.
--- I
>if I take a survey
> with several GPS receivers will they all
On 5/8/20 3:38 PM, Charles Steinmetz wrote:
Jim wrote:
I'm attaching a screen shot of 4 receivers, taken at the same time
(within seconds,not time-nuts same time) All sitting on the table
together.
One might expect closer agreement if all of the receivers were fed from
one antenna through a
Jim wrote:
I'm attaching a screen shot of 4 receivers, taken at the same time
(within seconds,not time-nuts same time) All sitting on the table together.
One might expect closer agreement if all of the receivers were fed from
one antenna through a splitter, but even then each rx will choose i
Hi
> On May 8, 2020, at 5:12 PM, Hal Murray wrote:
>
>
> Is there any published data on what happens to the quality of time if the
> survey is off by xxx meters?
Speed of light plus distance off “correct” plus constellation geometry are what
are usually tossed into examples. Turning that int
In message <20200508211209.315c1406...@ip-64-139-1-69.sjc.megapath.net>, Hal Mu
rray writes:
>Is there any published data on what happens to the quality of time if the
>survey is off by xxx meters?
I played with that many years ago, using the reported residuals from
the OnCore to slowly
Is there any published data on what happens to the quality of time if the
survey is off by xxx meters?
Do all the GPS receivers use the same coordinate system? If I take a survey
with several GPS receivers will they all get the same answer?
--
These are my opinions. I hate spam.
_
