I've been reading lots of forums and posts out there about RTK, affordable equipment like Reach RTK and Piksi, but Piksi seems it requires lots of configuration and according to some posts lots of things could go wrong, and as for the Reach RTK, and I haven't found much, in fact I haven't found any videos of people using them, they both claim to integrate with Pixhawk, but has anyone test them?, similar? or cheaper?, and specially on Rovers?
I'm sorry if this question was already answered but I'm researching before buying anything.
I have also been testing Reach and it seems I am in the same situation that out in the field it works ok sometimes,and then other times it doesn't. Last weekend I updated to the Beta 2.1 and this seem to be a big improvement, however it still has browser issues that need to be worked out. . I sat it out on my balcony and even though only had half sky view I got a good fix and strong 8-10 sat signals and got some very good cm accurate data. I more interested to use it for creating accurate GCPs rather than fix it to my UAV.
On the forum I see people doing this and then post processing the data and they seem to get very good results.
Im still keen to work with it , but now I need something more easy and reliable in the field. These following are a few others I am now looking at.
http://www.tersus-gnss.com/collections/gnss-rtk-boards Top of my list so far.
http://www.drobit.es/ Pros no need for ground markers claims to be very accurate, Cons, very pricey USD8-9k.(Also I don't need a flying solution).
https://www.kickstarter.com/projects/141973618/one-button-survey-ob... Very interesting and would be top of my list expect it wont be available until April next year.
http://v-map.net/about-v-map/ Just found this one this week and still studying it and seems quite good as well.
This one from Trimble also seems interesting. http://www.catalyst.trimble.com/index.html
This looks ok as well, however like everything in Australia, it expensive and just under 7k http://geomatics.com.au/
One thing is for sure,is a new one pops up nearly every few weeks now and I am sure between now and 6 months time there will be some very good options avalaible and likely a much lower costs.
thank you... Tom
Three options, depending on your skills and what you actually need.
1. open lrs telemetry link --> http://www.itluxembourg.lu/site/ultimate-lrs-or-3dr-radio/
2. lora serial connection --> http://www.libelium.com/development/waspmote/documentation/waspmote...
3. post processing the sd logged data (connect serial logger to reach output)
other options are possible but less viable.
I seems that the corrections can be sent by internet "ntrip client"... do you how to do it? what are the pros and cons?
If you use Reach's internal wifi only I guess that the range should be really small because it does not have external antennas and the transmission power is probably very low. That is why we use a Wifi router with higher transmission power and a high-gain antenna. All my devices (laptop, smartphone, ...) and Reach modules connect to that network so they can all access the corrections and RTK solutions.
I tried a lot of expensive commercial soutions about 5 years ago with a helicopter and a hovering rocket.
None of the L1 only soutions were reliable and robust.
I eventually spent the $ to get a L1.L2 trimble setup and it was both stable and reliable. The performance was amazing.
I doubt ANY of the L1 only solutions willbe stable and robust. I look forward to the low cost dual frequency solutions... as I believe they will be a game changer.
thank you Juan Diaz...... So we need to have a separate WiFi module and antenna to send corrections? I thought it uses Reach's internal wifi....
The range depends on many factors:
I have an Alfa Network Router, which has 500mW of Transmission power and an omni-directional antenna (supposedly 12dB although I guess it has much less, the stock antenna was 5dB). With this set-up I have been able to maintain stable FIX even with the base 90m away from the Router, and the Rover about 200m away from the router.
With a more powerful router and directive antennas you could have more range.
If RTK link is lost, the Rover starts working in SINGLE mode, and it is just like regular GPS with SBAS. In any case, I use Reach as a secondary GPS for safety.
How to calibrate sub cm precision in camera and gps ?
Is there any procedure ?
what is the range of wi-fi ?
can we connect it to internet for correction?
what happens when drone fly out of rtk wifi range? Does the rover gps is used as static gps?
Juan Diaz said: