A teaser from Michael Oborne, showing impressive precision. Using a Septentrio asterx-m and a HX-CH4601A. Full details coming soon to the APM wiki
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A teaser from Michael Oborne, showing impressive precision. Using a Septentrio asterx-m and a HX-CH4601A. Full details coming soon to the APM wiki
You need to be a member of diydrones to add comments!
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The prices will drop very quickly. In fact a couple of blog posts down, there is post about a $50 system that can do 1Hz RTK.
Hi Stijn, did you use both a Base and Rover or just a Rover to get that accuracy? What did you pay for that system?
Regards
Michael
We did an auto mission with the Septentrio asterx-m (https://www.youtube.com/watch?v=XrEAQV0pXUo). The landing accuracy is 10 - 20cm. The EKF makes also use from the altitude of the gps when switching from 3D fix to 3D fix RTK. It works on ArduCopter 3.3 and we make use from the sbf driver to read out the gps data. The base station sends rtcm3 messages at 1Hz and the receiver works at 10Hz.
A log from a flight in stabilize can be found here: https://perswww.kuleuven.be/~u0105330/RTK_stabilize.BIN
impressive precision and also great accuracy! ;-)
My understanding is that the GPSs in the video are at least 2k USD. So quite expensive but then again, they apparently really work!
the logs for that flight can be found here
http://vps.oborne.me/rtk/sept%20quad%207-9-2015/
the base station was set to send 1hz obs data, using rtcm3, with gps and glonass l1/l2, this is sent using the stock 3dr radio
the receiver was configured for 10hz data, using gps and glonass l1/l2, and the ekf was tunned to use the gps for altitude 100% and high dependence on gps position.
the accuracy of the gps in the video should be within the mm range.
Can't wait to implement this. Need precision positioning for making RF measurements with drones and have been waiting for an affordable solution.
Anybody tried this solution? http://www.emlid.com/shop/reach-rtk-kit/
The X-CH4601A is a dual frequency antenna so I assume the Septentrio Asterx-m is operating as a dual frequency receiver. I'm sure it cost quite a bit more than the drone.
But, I guess the point is to tune ArduCopter 3.4 to take advantage of the precision of RTK so you might as well use a robust - compared to a L1 only - system for that.
More interesting will be how much success people have with much more affordable single frequency systems.
Or we need an special gps?
sorry the anxious to wait the wiki ;)
Glup!! I'm still surprise with m8n, this looks more impressive;
It's not possible, if we have a gps and telem on the copter and on G station, that the GS work's as RTK station with any good quality GPS or the tablet?
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