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Matrice 210 RTK

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Dose the Matrice 220 RTK version produce centimeter meter accuracy on the pictures. My research tells me that the RTK only works for the centimeter accuracy on the hovering. I have als been told that this was true on the Matrice 600 RTK version. I fly the Inspire 1 Pro now and I am getting sub-meter accuracy with this UAV. The only way that I can get Centimeter accuracy is to use expensive ground control points.

Dose anyone know the cost of the batteries or the exact type of battery used on the new Matrice 210? I have been told that it will use the same battery as the Inspire 2, the TB55.

Thanks in advance for your response....
 
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Dose the Matrice 220 RTK version produce centimeter meter accuracy on the pictures. My research tells me that the RTK only works for the centimeter accuracy on the hovering. I have als been told that this was true on the Matrice 600 RTK version. I fly the Inspire 1 Pro now and I am getting sub-meter accuracy with this UAV. The only way that I can get Centimeter accuracy is to use expensive ground control points.

Dose anyone know the cost of the batteries or the exact type of battery used on the new Matrice 210? I have been told that it will use the same battery as the Inspire 2, the TB55.

Thanks in advance for your response....

I'd have to have our real technical guy in RTK get back to you on the first part of your question.

No pricing can be released publicly on Matrice 200 Series aircraft or components but it is compatible with both the TB50 and the TB55.

Feel free to shoot us an email and we can connect you for further discussion on the M210 RTK.
 
The only way that I can get Centimeter accuracy is to use expensive ground control points.

and that will remain - from what I understand it is for position accuracy only, no information is passed to the EXIF info for mapping accuracy Im afraid - its back to GCP!!
 
Dose the Matrice 220 RTK version produce centimeter meter accuracy on the pictures. My research tells me that the RTK only works for the centimeter accuracy on the hovering. I have als been told that this was true on the Matrice 600 RTK version. I fly the Inspire 1 Pro now and I am getting sub-meter accuracy with this UAV. The only way that I can get Centimeter accuracy is to use expensive ground control points.

Dose anyone know the cost of the batteries or the exact type of battery used on the new Matrice 210? I have been told that it will use the same battery as the Inspire 2, the TB55.

Thanks in advance for your response....

People who do commercial surveying have been discussing this a lot. While the RTK system does provide CM level positioning accuracy - it does not eliminate the need for ground control points for mapping and survey work. As a real quick primer for anyone who reads this and is not familiar with the RTK system, it improves accuracy by using a fixed GPS antenna on the ground in addition to 2 large GPS pucks on the copter to triangulate its position in 3D space. Instead of using position information from multiple satellites in space, the stationary ground antenna gets its position from all the satellites in space and then uses its fixed location to measure its distance to the copter and calculates its GPS position that way. The local and close range calculations allow a more accurate position fix. The reason you still need ground control points is because the copter can be moving at reasonably fast speeds and the ground station and onboard antennas can not stream the positioning data between them fast enough to maintain a CM accurate location at the time each photo is taken by a mapping or surveying program (and then write the data to the EXIF info). Until this is possible (at least with DJI) we will continue to have to have some ground control points for mapping and surveying to insure a high level of accuracy. As it relates to cinema work, the RTK system does help perform high precision moves and also helps with hovering position and altitude position. The other benefit for commercial (and cinema) users of an RTK system is that it eliminates the reliance on a magnetic compass - allowing for normal flying around areas of high magnetic interference (strong power lines, lots of steel structures, etc). The heading information is calculated by the RTK system instead of a compass - thus making it much more suitable for environments that give the magnetic compass problems.

If the M210 RTK uses the same RTK technology currently available to add to the M600, the above would apply to the 210 RTK. I have not heard if the RTK will be the same or if it will be different technology than DJI currently uses in their other RTK system.

Hope that helps a little - let us know if we can be of any further assistance with anything at all.

Michael
www.FloridaDroneSupply.com
 
People who do commercial surveying have been discussing this a lot. While the RTK system does provide CM level positioning accuracy - it does not eliminate the need for ground control points for mapping and survey work. As a real quick primer for anyone who reads this and is not familiar with the RTK system, it improves accuracy by using a fixed GPS antenna on the ground in addition to 2 large GPS pucks on the copter to triangulate its position in 3D space. Instead of using position information from multiple satellites in space, the stationary ground antenna gets its position from all the satellites in space and then uses its fixed location to measure its distance to the copter and calculates its GPS position that way. The local and close range calculations allow a more accurate position fix. The reason you still need ground control points is because the copter can be moving at reasonably fast speeds and the ground station and onboard antennas can not stream the positioning data between them fast enough to maintain a CM accurate location at the time each photo is taken by a mapping or surveying program (and then write the data to the EXIF info). Until this is possible (at least with DJI) we will continue to have to have some ground control points for mapping and surveying to insure a high level of accuracy. As it relates to cinema work, the RTK system does help perform high precision moves and also helps with hovering position and altitude position. The other benefit for commercial (and cinema) users of an RTK system is that it eliminates the reliance on a magnetic compass - allowing for normal flying around areas of high magnetic interference (strong power lines, lots of steel structures, etc). The heading information is calculated by the RTK system instead of a compass - thus making it much more suitable for environments that give the magnetic compass problems.

If the M210 RTK uses the same RTK technology currently available to add to the M600, the above would apply to the 210 RTK. I have not heard if the RTK will be the same or if it will be different technology than DJI currently uses in their other RTK system.

Hope that helps a little - let us know if we can be of any further assistance with anything at all.

Michael
www.FloridaDroneSupply.com


Well said and true
 
When will DJI get their act together and pass the RTK location data through from the flight controller to the camera gimbal to allow the exif info to be tagged with the rtf data- that would be a game changer for the industry and something sooooo easy to do!
 
I think the problem is in the streaming speed between all the components and the delay from the camera trigger to the recorded image. Certainly you would think this could be fixed with different hardware I would think. The problem as I understand it to be is that if the copter is traveling at 30 miles an hour and the GPS data has to be CM accurate that either the RTK's data correction stream to the FC - OR - the time from the FC getting the data to the time the camera is triggered and the file is written does not work fast enough to have CM level accuracy to know exactly where the copter was at the time the image is actually recorded. I am sure there are other more complicated issues happening as well, but other systems can do this (much more expensive) and it would also be nice to be able to tie into some of the public RTK systems as well. At least DJI is developing technology in this area and maybe we will see advances in it as more people purchase the Matrice 200 series drones and ask for this technology.
 
I think the problem is in the streaming speed between all the components and the delay from the camera trigger to the recorded image. Certainly you would think this could be fixed with different hardware I would think. The problem as I understand it to be is that if the copter is traveling at 30 miles an hour and the GPS data has to be CM accurate that either the RTK's data correction stream to the FC - OR - the time from the FC getting the data to the time the camera is triggered and the file is written does not work fast enough to have CM level accuracy to know exactly where the copter was at the time the image is actually recorded. I am sure there are other more complicated issues happening as well, but other systems can do this (much more expensive) and it would also be nice to be able to tie into some of the public RTK systems as well. At least DJI is developing technology in this area and maybe we will see advances in it as more people purchase the Matrice 200 series drones and ask for this technology.

I can do this for less than 2k by using pixhawk 2 and the new rtk here system which gives 5cm accuracy so while i fully accept your comments it can be done !
 
I can do this for less than 2k by using pixhawk 2 and the new rtk here system which gives 5cm accuracy so while i fully accept your comments it can be done !

Agreed. The technology is already there and available from 3rd parties. I just meant I am glad we are seeing DJI start down this path and hopefully they can improve their systems to make them more useful as more and more people become familiar with RTK and its benefits.

I've only read about the RTK Here+ but never actually tried one. Have you tested one yet?
 
Agreed. The technology is already there and available from 3rd parties. I just meant I am glad we are seeing DJI start down this path and hopefully they can improve their systems to make them more useful as more and more people become familiar with RTK and its benefits.

I've only read about the RTK Here+ but never actually tried one. Have you tested one yet?

Yes- they're quite good - looking at implementing a bolt on solution for my I2 utilising the Here + Pixhawk 2 and a couple of other goodies, but it reduces the flight time a lot!
 
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I think the problem is in the streaming speed between all the components and the delay from the camera trigger to the recorded image. Certainly you would think this could be fixed with different hardware I would think. The problem as I understand it to be is that if the copter is traveling at 30 miles an hour and the GPS data has to be CM accurate that either the RTK's data correction stream to the FC - OR - the time from the FC getting the data to the time the camera is triggered and the file is written does not work fast enough to have CM level accuracy to know exactly where the copter was at the time the image is actually recorded. I am sure there are other more complicated issues happening as well, but other systems can do this (much more expensive) and it would also be nice to be able to tie into some of the public RTK systems as well. At least DJI is developing technology in this area and maybe we will see advances in it as more people purchase the Matrice 200 series drones and ask for this technology.

It would seem to me that this does not need to be an RTK system, that a PPK system would suffice. I could understand the logic of using a real-time system if we were hauling freight or driving on a crowded street, but I don't see getting the data to the base station in real-time as critical to the actual act of creating a high accuracy survey. If I'm missing something let me know...
 
The RTK unit on the M200 calculates its position by itself and gets correction data from the base station, which means that the update rate from the base station to the M200 isn't that critical. The correction data can be 10-20 seconds old without affecting the accuracy.

The RTK uses the wavelength of the carrier frequency to do the fine tuning of position and can have a position update rate of 10Hz or more. I think that the RTK receiver on M200 uses both the L1 and L2 frequencies to get faster and more stable fix solution.

Most countries have a national network of base stations that can create a virtual base station at your position, it normally requires a subscription and a network connection. If you could get DJI to support that you wouldn't need to use the DJI reference station, instead you use the virtual base station. That also means that the virtual reference station has an exact known position which means that you get absolute precision and not just a precision relative to the DJI base station.

Cheers
Hakan
 
Thanks Michael for your explanation. Regarding the 210 RTK, I wonder if it can log 'raw' GNSS data that i can post process later (post flight). For typical surveys, I use a GNSS receiver (Trimble or Fugro OmniStar) which receives the Fugro WADGPS correction signal which is good for 15-25cm
straight off the bat - no need for a base station. I can then post process the data using NovaTel WayPoint software to get it to RTK accuracies. An ability to do this with the Matrice 210 RTK would mean that I would not have to bother with establishing base stations. For a mapping project where
the coastline is very long (tellus4d, my company, specialises in coastal imaging) this would save me much time and hassle. So far, there is very little info available on the DJI website - or anywhere else - on the actual working of the 210's positioning system. Any insight is very much appreciated! Geoff
 

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