Great, thank you!
Too many times we hear the opposite.
I am glad that - for once - someone has been willing to share his good
results with RTKLIB combined with low cost receivers.
To cool down you enthusiasm a bit, I anticipate that you should not
expect much difference between a LEA-4T and a NV08C-CSM. Carrier phase
noise is similar and despite tracking Glonass, that is still hardly
usable by RTKLIB since it is affected by the well-known biases any
Glonass receiver RF receive path is subject to. And RTKLIB
"auto-calibration" feature is still not implemented.
If I am allowed, I am under the impression that Tomoji's development
road-map is adding more and more features to RTKLIB so that now
resembles very much a professional product rather than an open-source
*one-man* effort. Surely having multiple frequencies, multiple
constellations, super standalone post-processing (PPP), and beautifully
coloured GUIs is great and we are always grateful to him for that. But I
wonder how many users desire to have a robust and very lean single
frequency GPS RTK algortihm. One that can run headless on Android
perhaps, or even on a STM32F4 bare metal. One that can fill the gap with
the most common quirks of low-cost receivers (e.g. random phase slips)
and use some sort of pre-processing RAIM to indentify and exclude
outliers. One that can be integrated in robotic automatic guidance projects.
Back to receivers, the only real difference between NV08C-CSM and LEA-4T
is that the latter is gone out of production several years ago, and
uBlox has not replaced it with an equally performing module. 5T and 6T
in fact can only measure at 10Hz under certain conditions and they are
not certified to do that anyway.
So if you need a module to build a commercial product you only have
three choices right now: NVS NV08C-CSM, ublox 6T/P, and Skytraq S1315F-RAW.
Of the three, only the first has to my knowledge a clear development and
upgrade path. There are rumors that the new revision of NV08C -to come
out later this year- will fully support Galileo and, as most of us know,
Galileo Signal In Space specifications guarantee interoperability with
GPS by design. Thus, as soon as there will be a sensible number of
Galileo birds in the sky, dual constellation low-cost RTK will become
easily useable by all of us. Not to mention dual frequency of course, as
L5 and E5a bands overlap.
Congratulations again and keep it up,
Michele
On 16/03/2013 09:04, napoleon wrote:
Hello,
My setup is:
Rover:40db tallysman antenna, lea-4t receiver
Base: leica 1202gg antenna ntrip caster connection,rtcm 3 data.
baseline 6.68 m
base -kinimatic solution
I searched for the lea-4t configuration, i set it up, i pressed ''start''and
i had first fix after 1.5 minute and stable fix after 7 minutes....(less
than 2.5cm)-MY FIRST TRY
Looks like a joke.
I am totally impressed.
I am planning a new config with tallysman gnss antenna and nvs-08 and i am
afraid to imagine the result.
I will also test vrs and max solutions from the base network (i guess i can
feed max solution through rtcm 3 to rtklib)
Anyway i have to say again that i am impressed and to thank you ttakasu and
team.
--
View this message in context:
http://open-source-gps-related-discussion-and-support.1099874.n2.nabble.com/impressed-tp7572660.html
Sent from the Open Source GPS-related discussion and support mailing list
archive at Nabble.com.
_______________________________________________
This message is sent to you from [email protected] mailing list.
Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your
subscription
For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS
_______________________________________________
This message is sent to you from [email protected] mailing list.
Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your
subscription
For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS
