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The Phantom 4 RTK Quadcopter with D-RTK 2 GNSS Mobile Station Combo from DJI is a Phantom 4 quadcopter with additional technology designed to deliver centimeter-level accurate mapping that can be extremely useful for surveying, construction sites, and inspections. Utilizing an RTK receiver on the top of Phantom 4 and a built-in GNSS module, the Phantom 4 RTK can achieve 1cm+1ppm RTK horizontal and 1.5cm+1ppm RTK vertical positioning accuracy.
In addition to the RTK receiver and GNSS module, the Phantom 4 RTK can achieve such accuracy thanks to DJI's TimeSync system and the gimbal camera's calibration process. The camera is the same one that's on a standard Phantom 4, but with the Phantom 4 RTK each camera has its radial and tangential lens distortions measured. They are added to the metadata of all captured images, allowing for accurate post-processing that account for the distortions.
The Phantom 4 RTK can perform mapping duties in real time, but this bundle also includes a separate D-RTK 2 GNSS Mobile Station and tripod to help compensate for locations where the Phantom 4 experiences poor or no signal. The Mobile Station can access GPS and GLONASS to provide real-time differential data, and can communicate that via OcuSync, 4G, Wi-Fi, or LAN. When mapping, pilots can utilize the Photogrammetry and Waypoint Flight modes in the GS RTK app which give mapping-specific functionality, such as selecting flight paths and directly loading KML area files. Combine it all and you have an enterprise-level mapping solution that can be used right out of the box.