Title is misleading - as far as I know centimeter accuracy is only possible with an RTK base station in the area where you're using the GPS, e.g. in a survey. I'm guessing the chipset allows capturing of raw data that can be post-processed.
NavSpark: Arduino Compatible with GPS GNSS Receiver
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Re: NavSpark: Arduino Compatible with GPS GNSS Receiver
#12is centimeter accuracy even possible with GPS? http://www.gps.gov/systems/augmentations/ cites 10-15 centimeter accuracy under their NDGPS modernization efforts, but don't even say they've gotten there yet.
Re: NavSpark: Arduino Compatible with GPS GNSS Receiver
#13Earlier quoted context omitted.
It's not possible, even with pretty ideal conditions. Edit: I excluded RTK stuff in that comment :)
It is, using RTK (real time kinematic) and 2 different receivers: http://www.kickstarter.com/projects/swiftnav/piksi-the-rtk-g...
And there you have it.
This is from the datasheet of the Trimble R10 surveying receiver:
real time Kinematic surveying
Single Baseline Horizontal ...................................... 8 mm + 1 ppm RMS
Vertical ....................................... 15 mm + 1 ppm RMS
Network RTK3
Horizontal ..................................... 8 mm + 0.5 ppm RMS
Vertical ...................................... 15 mm + 0.5 ppm RMS
RTK start-up time for specified precisions4 .....................2 to 8 seconds
Trimble CenterPoint RTX
Horizontal .................................................. 4 cm
Vertical .................................................... 9 cm
RTX convergence time for specified precisions12 ........... 30 minutes or less
RTX QuickStart convergence time for specified precisions12 .... 5 minutes or less Trimble xFill5
Horizontal ................................. RTK6 + 10 mm/minute RMS
Vertical ................................... RTK6 + 20 mm/minute RMS
Re: NavSpark: Arduino Compatible with GPS GNSS Receiver
#14Title is misleading - as far as I know centimeter accuracy is only possible with an RTK base station in the area where you're using the GPS, e.g. in a survey. I'm guessing the chipset allows capturing of raw data that can be post-processed. http://en.wikipedia.org/wiki/Real_Time_Kinematic
They have a $50 version that supports raw data. Although, without a high quality antenna I wonder if RTK is even going to help much?
>> NS-RAW: carrier phase raw measurement GPS receiver, max 5Hz update rate, RTKLIB supported S1315F-RAW in the form of plug-and-play NavSpark
Re: NavSpark: Arduino Compatible with GPS GNSS Receiver
#15Positioning is a really huge concern in robotics; how do you know where your robot is? Just because you told it to move doesn't mean it did, or that it got there. So that's why this is really cool. Millimeter accuracy would be better, I don't even know if that's possible with GPS at all.
It isn't possible in real-time, but surveying grade GPS receivers can approach that level of accuracy with long collection times and post-processing.
See my above post.
There are self-contained systems that do this in real-time.
Re: NavSpark: Arduino Compatible with GPS GNSS Receiver
#16Earlier quoted context omitted.
It's not possible, even with pretty ideal conditions. Edit: I excluded RTK stuff in that comment :)
It is, using RTK (real time kinematic) and 2 different receivers: http://www.kickstarter.com/projects/swiftnav/piksi-the-rtk-g...
Yes but that somewhat limits the practicality because you need two receivers, a clear signal path between them and one has to be relatively static.
It's fine for surveying but for dynamic applications which are far more common, it's a pain.
Re: NavSpark: Arduino Compatible with GPS GNSS Receiver
#17You can already get a $20 GPS module, Arduino compatible. Just take any random GPS mouse, they will be talking NMEA over some serial line. Of course you don't get "centimeter accurate", but that's a lie anyway, so nothing lost.
GPS mouse? Unless you mean module (DYAC), can you please give a pointer?
Re: NavSpark: Arduino Compatible with GPS GNSS Receiver
#18Cheap GPS, cheap pocket tri-copters, fun fun fun!
I really don't care about taco service but it would be nice if I could call someone at home and say "I forgot my under 8 oz item at home" they could attach it to the copter and send it to my 15 miles away at work.
Soon, if not already, that will be an off the shelf capability.
Re: NavSpark: Arduino Compatible with GPS GNSS Receiver
#19I funded hoping for a couple. I imagine the centimetre accuracy will be hard yo achieve,but what sort of accuracy is required to calculate average speed over 200 m to within 2 km/h?
Suppose you smooth the input will it be sufficient or does 2 m accuracy mean that it oscillates so wildly within that circle that it's only worth it for positioning alone?
Re: NavSpark: Arduino Compatible with GPS GNSS Receiver
#20I don't see any reference to "centimeter accurate" in this description.
It's listed in the "Perk" image near the top, if you couldn't find it.
http://images.indiegogo.com/file_attachments/305393/files/20...
