Dear all, I also want to thank developers of RTKlib. During last month one the students under my control tested nvs08c-csm with RTKlib. At first we tried to get our coordinates relative to RTCM base station. During 3 days the difference in fix-position coordinates didn't exceed 1cm (on each coordinate). Distance between RTCM station and our antenna was about 3 km. Then we determined coordinates between RTCM station and second reciever. And at the end we determined coordinates between two nvs08c-csm receivers (baseline about 8m).
We also checked manually baseline distance between two nvs08c-csm receivers by subtracting coordinates of the first nvs08c-csm receiver (that were got relative to RTCM station) from the coordinates of the second nvc08c-csm receiver (that were also got relative to RTCM station). The result was the same as RTKlib outputed. I also appreciated strongly the posibility to stream data from receiver through "strsvr". It was very comfortable to work with receivers output in parallel with the student. Thanks a lot for RTKlib. On Sat, Mar 16, 2013 at 1:40 PM, Michele Bavaro <mic.bav...@yahoo.co.uk>wrote: > 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 FOSS-GPS@lists.osgeo.org 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 FOSS-GPS@lists.osgeo.org 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 > >
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