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- เผยแพร่เมื่อ 23 ก.พ. 2022
- In this video, we will talk about the technique called real-time kinematic, or RTK. RTK is used to enhance the positioning accuracy of the GNSS. With an RTK-capable receiver, you can measure your position with centimeter accuracy. Therefore such receivers are irreplaceable when it comes to land surveying and other applications where you need to know your exact position.
Watch "How GPS Works": • How GPS Works
Watch "RTK over NTRIP": • Reach RS2: Receiving R...
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Beautiful animation, keep it up!
Best explanation on YT, thanks.
Thank you so much, this helped a lot!
Great explanation!
Tremendo nice excellent!!! Way to go.
Very professional. Thanks
Much better, more detailed video!
Well explained
really incredible videos thank you very much! subbed :)
Hi, what is the accuracy difference using only one Emlid SR2+ as a rover with RTK via NTRIP (with wifi cellphone) vs one SR2+ as a rover and another one as a base like in the video ?
S22 supports carrier phase if I am not mistaking. RTCM messages can be received from any free nearby station.
Is there nothing preventing my phone from achieving
With RTK do you need a rover? Or would a Drone with an RTK module count as the rover in this case?
Hi there! RTK drone can act as a rover.
For example, you can learn how to work with Reach RS2 base and DJI Phantom 4 RTK rover in our docs: docs.emlid.com/reachrs2/tutorials/integration/p4p-rtk/#perform-flight.
Pretty good simplification of the current state of RTK. I've been using RTK for almost 30 years, have built and operated an RTK network, train people on how to use it and help develop standards for its use with a major state DOT.
Your distance error statement was not correct in my opinion, at least for this level of discussion. In my opinion, you should simply have described the distant dependent error. Saying it is good or not at a range depends on the precision/accuracy needed, and that varies. RTK is entirely appropriate at 50im, for certain applications (single or multi-band) Single band RTK isn't just limited to 10km, It has more to do with the integer ambiguity (described) and often having to fix over a known point. Multiband RTK has near instantaneous 'fix' and can better correct for ionospheric error, which does impact the distance dependent error, but not by much for RTK.
This is a good quick description overall, and one that I would use if I were to put it in context.
Great.
Is it possible to achieve millimetric precision ?
Lmao you’re so greedy I love it
nope. rtk cant reach mm precision but it is possible on relative positioning
Can you like have an rtk drone to aid the rover and base when its hard to find signal because of say vegetation?
Hi! It is possible, but if there is dense vegetation, it may be difficult to obtain an accurate drone map too. Photogrammetric software needs contrasting points in photos to tie them together. Trees don't work as points of contrast.
@@Emlid i hope that "weakness" or downside of rtk could be addressed. Gotta go for total station where there is vegetation blocking the signal
_centimeter level accuracy_
is it necessary that satellite is same for rover and receiver?
Usually in the rover and base will have same satellite if they have in same area (approximately within 30km radius)
@@ademdingin thanks. can we say same for the phone gps? that they will be connected to the same satellite in 30km radius?
How is the known control point determined?
Base position is known by conventional surveying, or gps averaging. And your rover accuracy relative to the base is good, but the absolute accuracy is only as good as your base position accuracy.
Where do I buy?
Hi there! You can place an order at our online store: store.emlid.com/ :) You can also check out the list of dealers in your country: emlid.com/dealers/
I learned the RTK survey Can anybody help me in pakistan ??
But we need explanation about static......
Please note NOT PPK.... We need static
Hi there, thanks for your request! We'll consider your idea for future tutorials :)
All the license "professional" surveyors that I hired and personally witnessed stake out a worksite using just the carry around one... I would always double checking their work measuring physicals tools it has always been off by a whole six inches to a foot no matter who I hired. Now watching this video and knowing that none of them use proper equipment to give us accurate information I am fuming at how much money was wasted paying those lazy cheap frauds. Should/can I sue them?
Is either the site has canopy or the instrument they brought is fault, next time tell them to do test of instrument before site operation
Lol no they are using a remote base through the internet, they don't need to set up their own base station. It's called VRS and it's not going to be 6" off. In my experience 99% of the time some guy with a tape measure is saying that the surveyors are off, he is the one that is wrong.
I can assure that neither I or anyone that works for me would have done that, if it is true. Take your concerns to the registered professional who you should have contracted for the work. If you are not satisfied, take you claim to the state board of registration. If you just hired some hack that isn't licensed (as they are legally required to be in most states) then you get what you pay for.
If you are in California, you have a lot of options. If you are in one of those "I hate regulation" states, then you might be screwed.
@@gunningopher Sadly all these surveyors were licensed, I am in Florida so it seems this is one area that needs better regulated. I think part of the problem is with some of these surveyors the actually licensed person is not actually doing any the work and is sending barely trained field workers out to do the bare minimum to cut cost.
@@doormanfoc take a complaint to the board of registration. It is common practice for the licensed practitioner to be in the office, but that in no way absolves him of responsible charge for the work that they contract.
Doesn't say much.. gloss over many details!
How RTK works: math and handwaving. This explained nothing. How about explaining those complicated calculations at least a little bit?
This is the only explanation I found that actually made sense to my non-surveyor soul 🥲thank you so so much
Beautiful animation, keep it up!