Yo Håkan!
On Tue, 21 May 2024 21:41:01 +0200
Håkan Elmqvist <hakelm@smeden.org> wrote:
Returning to this subject I am sorry being a bit slow but I simply
didn’t have the time.
No one here is in a rush.
All the time I get the same position from the receiver, so I took the
receiver on a bike-tour resulting in a 10 MB json file. As you can
see below I just got a single position in spite of many km pedaled
(jq extracts the lat and lon fields, awk with seen eliminates all
identical results):
No, I can't see below, as you failed to include your data.
You can get that this way: gpspipe -R -x 30 > raw.log"
If I, however, reset the receiver between observations I get a fresh
position every time and the values are very reasonable (extracting
UTC, lat and lon with awk):
How do you "reset the reeciver"?
root@pipickle:~# usbreset 1546:01a7
Resetting u-blox 7 - GPS/GNSS Receiver ... ok
Uh, what is usbreset? That is no reseting the GPS, that is resetting
the USB connection.
Also, do you have a new model, or late model u-blox 7? You should upgrade
to at least a verion 8, if not a versio 10.
gpsd: 3.22 (revision 3.22), receiver u-blox 7 – GPS/GNSS (??).
Yeah realize that gpsd 3.22 is really old? Latest release is 3.25,
and 3.26 is not far away.
What is the problem with this receiver, is there anything I can do or
is it that simple that I have been deceived buying this cheap gadget?
First, update to 3.26, or git head, then send us a raw log capture.
And you can certainly do way better than a really old ublox 7.
Ps Pls remember that the fourth fractional decimal digit of a minute
in most places corresponds to 1/10000 Nautical Mile (1852 m) and is
worth around 18 cm.
Yes, as shown here:
https://gpsd.gitlab.io/gpsd/gpsd-numbers-matter.html#_latitude_and_longitude
No way a 7-series is doing much better than 10m.
RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
gem@rellim.com Tel:+1 541 382 8588
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"If you can't measure it, you can't improve it." - Lord Kelvin
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