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• Media Coverage

DJI Launches The Phantom 4 RTK Globally

News 2018-10-15

DJI’s Most Compact And Accurate Low Altitude Mapping Solution To Date

DJI, the world's leader in civilian drones and aerial imaging technology, today announced the global rollout of the Phantom 4 RTK, a high-precision aerial survey drone that combines centimeter-level navigation and positioning with a high-performance imaging system to improve survey efficiency and accuracy, reducing operational difficulty and cost.

"The Phantom 4 RTK was engineered to meet the specific needs of its users who have come to rely on DJI drones as powerful tools for surveying, mapping or inspection operations,” said Sunny Liao, Director of Enterprise, Europe at DJI. “We took feedback from the drone mapping and surveying market on board and believe this solution demonstrates our commitment to strengthening our involvement and innovation in different enterprise verticals where we see substantial demand and potential for growth.”

Centimeter Level Positioning System

A new RTK module is integrated directly into the drone, providing real-time, centimeter-level positioning data for improved absolute accuracy on image metadata.

A non-RTK drone requires up to 40 ground control points (GCP) per square kilometer which takes several hours to place. The DJI Phantom 4 RTK has an in-built centimeter-accurate RTK navigation positioning system and a high-performance imaging system. Combined with the RTK positioning module (GPS L1 L2, GLONASS L1 L2, Galileo E1 E5a and BeiDou B1 B2) it potentially reduces the number of GCPs needed to 0, which saves at least 75% in set-up time. Sitting just beneath the RTK receiver is a redundant GNSS module, installed to maintain flight stability in signal-poor regions such as dense cities. Combining both modules, the Phantom 4 RTK is able to optimize flight safety while ensuring the most precise data is captured for complex surveying, mapping and inspection workflows.

The RTK module can provide positioning accuracy of 1cm+1ppm (horizontal), 1.5cm+1ppm (vertical), and the Phantom 4 RTK can get the 5cm [1] absolute horizontal accuracy of photogrammetric models.

The Phantom 4 RTK can be integrated into any workflow, with the ability to connect its positioning system to the D-RTK 2 Mobile Station, NTRIP (Network Transport of RTCM via Internet Protocol) using a 4G dongle or a WiFi hotspot  [2] .

Gather Accurate Data with TimeSync

To take full advantage of the Phantom 4 RTK’s positioning modules, the new TimeSync system was created to continually align the flight controller, camera and RTK module. Additionally, TimeSync ensures that the Phantom 4 RTK records factory-calibrated lense parameters alongside position, altitude and other data onto each photo, matching the positioning data to the center of the camera’s CMOS sensor and thus optimizing the results from photogrammetric methods.

Precise Imaging System

The drone is equipped with a 1” 20 megapixel CMOS sensor. The mechanical shutter makes mapping missions or regular data capture seamless as the Phantom 4 RTK can move while taking pictures without the risk of rolling shutter blur. Due to the high resolution, the Phantom 4 RTK can achieve a Ground Sample Distance (GSD) of 2.74 cm at 100 meters flight altitude.

To ensure each Phantom 4 RTK offers unparalleled accuracy, every single camera lens goes through a rigorous calibration process where radial and tangential lens distortions are measured. The distortion parameters gathered are saved into each image’s metadata, letting post-processing software adjust uniquely for every user.

In areas with lack of RTK coverage, the DJI Phantom 4 RTK allows for the use of Post Processed Kinematics (PPK). The DJI Phantom 4 RTK captures original satellite observation data as well as the ephemeris data and stores it in a PPKRAW.bin file in RTCM 3.2. format. Additionally, the Phantom 4 RTK converts the satellite data on the fly to the RINEX format (Receiver Independent Exchange Format) and writes the data into a RINEX.obs file. Thanks to the internal synchronization of the GNSS position and camera, the Timestamp.MRK file provides a precise recording of the highly accurate image position. All operation-relevant data is stored on a Micro-SD card in a unique folder for each mission. The consistency of the Phantom 4 RTK’s data reduces the time needed to validate the data and results in an efficient post-processing workflow with minimal to no manual adjustments.

Safer, Smarter and Stable Flight

The Phantom 4 RTK’s OcuSync video transmission system enables a stable connection between the drone and its remote controller. The system features strong interference resistance. It delivers 720p video transmission feeds at a distance of up to 7km, which is ideal for mapping larger sites. The flight time of up to 30 minutes allows pilots to complete long missions without having to land the drone to change batteries. Even if the area is too large to map on a single battery charge, the Operation Resumption function of the GS RTK App automatically resumes the mission after the battery has been replaced.

Mobile SDK Supported

The Phantom 4 RTK is compatible with the DJI Mobile SDK, opening up its functions to automation and customization through a mobile device.

Purpose-Built Flight Planning Application

A new GS RTK app allows pilots to intelligently control their Phantom 4 RTK with two planning modes – Photogrammetry and Waypoint Flight – alongside a more traditional flight mode. The planning modes let pilots select the drone’s flight path while adjusting overlap rate, altitude, speed, camera parameters and more, offering an automated mapping or inspection workflow. The planned flights are easily repeatable, letting teams collect the same data across different periods to track site progress and easily detect changes.

The GS RTK app has implemented direct loading of KML and KMZ files for in-office flight planning, a new shutter priori mode that keeps the exposure consistent across a whole mission and a strong wind alarm to warn pilots in adverse conditions during automated flight.

Seamless Compatibility with D-RTK 2 Mobile Station

The Phantom 4 RTK is compatible with the D-RTK 2 Mobile Station, providing real-time differential data to the drone and forming an accurate surveying solution. The Mobile Station’s rugged design and OcuSync transmission system ensures users can gain centimeter-level accurate data with their Phantom 4 RTK even in challenging conditions.

Phantom 4 RTK In Action

DJI has been working with European construction giant Strabag SE, a major player in transport infrastructure. Strabag has been utilizing drone technology for several mapping projects since 2010, assessing the benefits using aerial data for 3D modelling in reducing costs and improving operational efficiencies. The latest tool-of-choice for their operations is the DJI Phantom 4 RTK.

"The use of drones for construction mapping has a lot of advantages. Their integration changes our workflow and simplifies many operational steps,” said Dr. Thomas Groeninger, Head of Business Unit Digital Object Survey and UAV at Strabag SE. “Conventional surveying methods also deliver 3D models, but digital terrain models created from drone data provide a higher point density. Therefore, reality is portrayed in much more detail.”

Price and Availability

The retail price of a Phantom 4 RTK is €5,700, which includes the drone, remote controller, two intelligent flight batteries, one remote controller intelligent battery, charger hubs for both types of batteries, power adapter and cable, four propeller pairs, and accessories. The retail price of a D-RTK 2 Mobile Station is €3,600. The retail price of a bundle, including Phantom 4 RTK and D-RTK 2 Mobile Station is €7,800.

The Phantom 4 RTK and D-RTK 2 Mobile Station are available today through authorized DJI Enterprise dealers worldwide. Shipping for Phantom 4 RTK starts from October 2018 and for the D-RTK 2 Mobile Station from November 2018. To order the Phantom 4 RTK, please fill out the form at www.dji.com/phantom-4-rtk

For more information about the Phantom 4 RTK, visit:    www.dji.com/phantom-4-rtk

For more on Strabag’s use of drones, visit:  https://enterprise.dji.com/news/detail/next-generation-mapping

Strabag Video:  http://bit.ly/DJIStrabag

[1] When flying in sunny conditions, wind speeds below 4 m/s, 100m height and 2.74 cm GSD, front overlap rate of 80%, side overlap rate of 70%. When flying with lower altitude, the absolute horizontal accuracy can improve.

[2] WiFi is supported work with OcuSync in areas with 5.8GHz: SRRC/NCC/FCC<26 dBm

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Phantom 4 RTK

Visionary intelligence. elevated accuracy..

Upgrade your next mapping mission with the Phantom 4 RTK – the most compact and accurate low altitude mapping solution.

1'' CMOS Sensor

D-RTK 2 GNSS Mobile Station

RTK Horizontal Positioning Accuracy

RTK Vertical Positioning Accuracy

Absolute Horizontal Accuracy of Photogrammetric Models

Centimeter-Level Positioning System

A new RTK module is integrated directly into the Phantom 4 RTK, providing real-time, centimeter-level positioning data for improved absolute accuracy on image metadata. In addition to optimized flight safety and precise data collection, the Phantom 4 RTK stores satellite observation data to be used for Post Processed Kinematics (PPK), which can be conducted using DJI Cloud PPK Service [2] . Fit the Phantom 4 RTK to any workflow, with the ability to connect this positioning system to the D-RTK 2 High Precision GNSS Mobile Station, or NTRIP (Network Transport of RTCM via Internet Protocol) using a 4G dongle or WiFi hotspot.

Gather Accurate Data with TimeSync

To take full advantage of the Phantom 4 RTK’s positioning modules, the new TimeSync system was created to continually align the flight controller, camera and RTK module. Additionally, TimeSync ensures each photo uses the most accurate metadata and fixes the positioning data to optical center of the lens – optimizing the results from photogrammetric methods and letting the image achieve centimeter-level positioning data.

Precise Imaging System

Capture the best image data with a 1-inch, 20-megapixel CMOS sensor. Mechanical shutter makes mapping missions or regular data capture seamless as the Phantom 4 RTK can move while taking pictures without the risk of rolling shutter blur. Due to the high resolution, the Phantom 4 RTK can achieve a ground sample distance (GSD) of 2.74 cm at 100 meters flight altitude. To ensure each Phantom 4 RTK offers unparalleled accuracy, every single camera lens goes through a rigorous calibration process, with parameters saved into each image’s metadata, letting post-processing software adjust uniquely for every user.

Purpose-Built Flight Planning Application

A new DJI GS RTK app and Remote Controller with built-in screen, giving users a streamlined control scheme for surveying missions and other data acquisition scenarios. The GS RTK app allows pilots to intelligently control their Phantom 4 RTK, with multiple planning modes, including Photogrammetry (2D and 3D), Waypoint Flight, Terrain Awareness, Block Segmentation [3] , and more. Users can also import KML/KMZ files to optimize the workflow for their missions. With the built-in screen, pilots can clearly view and plan their missions on an ultra-bright, 5.5-inch HD display.

Access a Variety of 3rd Party Applications

Pilots with experience using 3rd party apps on DJI drones can access the world's leading drone app ecosystem for their Phantom 4 RTK with the SDK Remote Controller. Users can plug in a compatible Android or iOS device and install any compatible DJI Mobile SDK-enabled app to harness the full power of their Phantom 4 RTK.

OcuSync Transmission System

Enjoy stable and reliable HD image and video transmission at distances of up to 7 km, great for mapping larger sites. [4]

Seamless Compatibility with D-RTK 2 Mobile Station

Support your Phantom 4 RTK missions with the D-RTK 2 Mobile Station – providing real-time differential data to the drone and forming an accurate surveying solution, or acquire accurate location coordinates when used as an RTK rover. The Mobile Station’s rugged design and OcuSync transmission system ensures you can gain centimeter-level accurate data with your Phantom 4 RTK in any condition.

Start Mapping Today

With a built-in flight planning app (GS RTK) and an easy method to collect RTK data (RTK Network or D-RTK 2 Mobile Station), pilots have a full solution for any surveying, mapping or inspection workflow – right out of the box.

Order your Phantom 4 RTK Today

The Phantom 4 RTK is available for order through official DJI Dealers. Contact us below for the team to reach out.

1.When flying at 100m height, 2.7cm GSD, sunny.

2.DJI Cloud PPK Service is currently not available in in the US, Canada, Hong Kong SAR, or Macau SAR. Support is coming soon. For more information on the Service and a free trial, please contact your local dealer.

3.In some countries, local regulations do not permit Multi-Aircraft Control when executing Block Segmentation missions or require special approval. Please consult and follow the applicable rules wherever you operate.

4.Unobstructed, free of interference, when FCC compliant. Maximum flight range specification is a proxy for radio link strength and resilience. Always fly your drone within visual line of sight unless otherwise permitted.

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Phantom 4 RTK

• Device Accessories

• Free Shipping
• 1% DJI Credit Reward
• 14-Day Returns
• Max flight time: 30 min
• Max transmission range: up to 4.34 miles (7 km)
• 20 MP 1-inch CMOS Sensor
• Built-in RTK module, support PPK
• Accurate positioning data with TimeSync
• Integrated flight planning with GS RTK app
• Complete mapping solution when used with DJI Terra

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