I've been looking through the search results regarding GPS receivers, and I can't find what I'm looking for. I'm working on an autonomous vehicle project (well, as autonomous as possible based on budget and hardware constraints) which requires high accuracy GPS position information; in this case, the smaller and the more accurate the better. I know there are both accurate and small GPS receivers, but I can't find any information about where to purchase such a chip. If any one can point me towards such a product that can be easily purchased, I'd be grateful.
Try some of these
https://www.adafruit.com/?q=gps
(forum seems to add some extra characters to beginning & end)
You might help the forum by saying exactly what you mean by;
'high accuracy GPS position information'
Thanks for the quick replies. @CrossRoads, that's a good starting point, and ticks all the boxes bar one; accuracy. Unfortunately, ~3m accuracy won't cut it for my needs.
@srnet, I'm looking for something with maybe 20cm or so for accuracy. In the first link I included the company claims a 1cm accuracy, so I know such accuracy is possible. However, cost is a factor, so something that is accurate to about 20cm that doesn't cost an arm and a leg (and maybe other bits too) would work.
dlaurence01:
However, cost is a factor, so something that is accurate to about 20cm that doesn't cost an arm and a leg (and maybe other bits too) would work.
You might help the forum by saying exactly what you mean by;
'doesn't cost an arm and a leg'
To go much beyond the +- 5m precision of most GPSs is likely to cost in the hundreds of pounds\dollars\euros.
If you are willing to spend $200 and have a source of RTCM correction information, you can obtain 20 cm accuracy using a receiver like this one.
dlaurence01:
Thanks for the quick replies. @CrossRoads, that's a good starting point, and ticks all the boxes bar one; accuracy. Unfortunately, ~3m accuracy won't cut it for my needs.
Then raw GPS won't work, you require some form of differential GPS for accuracy better than that, and a good view of the sky, and special antennas.
I had bought 1 of these cm accuracy GPS receivers about a year ago. They cost you around $600 if bought from reliable B2B/B2C websites from China. China always have seem to have stock.
Ohh and some might even require additional base boards to interface the actual chip which costs around $100-$200 more.
Btw FYI OEM615 was already End of Life in 2017.
You should have a look at BD series instead. They have multiple GPS chips based on features/use cases (all with cm accuracy) such as triple frequency support, Inertial Navigation System (INS) etc. etc.
srnet:
You might help the forum by saying exactly what you mean by;'doesn't cost an arm and a leg'
To go much beyond the +- 5m precision of most GPSs is likely to cost in the hundreds of pounds\dollars\euros.
What I mean by "doesn't cost an arm and a leg" means something that is in the neighborhood of sub-$500. I'm fully aware that accuracy isn't cheap in this case, and while I can't spend the $6k a friend of mine mentioned (not sure about his accuracy, but that's another story...) a $500 price tag is doable.
jremington:
If you are willing to spend $200 and have a source of RTCM correction information, you can obtain 20 cm accuracy using a receiver like this one.
This looks like it could work quite well, thanks for the lead. Any chance you know of one a bit smaller?
francesberrms2_9_198_7:
I had bought 1 of these cm accuracy GPS receivers about a year ago. They cost you around $600 if bought from reliable B2B/B2C websites from China. China always have seem to have stock.Ohh and some might even require additional base boards to interface the actual chip which costs around $100-$200 more.
Btw FYI OEM615 was already End of Life in 2017.
You should have a look at BD series instead. They have multiple GPS chips based on features/use cases (all with cm accuracy) such as triple frequency support, Inertial Navigation System (INS) etc. etc.
A cm accuracy receiver would be great, and $600 is doable. Could you provide a link please?
You can get cm accuracy using two of the receivers linked in reply #5 ($400), plus a laptop, an RPi or desktop computer.
One serves as a base station, as described here.
jremington:
You can get cm accuracy using two of the receivers linked in reply #5 ($400), plus a laptop, an RPi or desktop computer.One serves as a base station, as described here.
2.5 cm accuracy for ~$400? I think we have a winner. Thank you!