DJI Phantom 4 RTK
HORIZONTAL RTK ACCURACY
VERTICAL RTK ACCURACY
|30 Min||7 km||1 cm + 1 ppm||1.5 cm + 1 ppm||Ocusync||5 directions|
DJI has rethought its drone technology from the ground-up, revolutionising its systems to achieve a new standard for drone accuracy - resulting in the creation of the Phantom 4 RTK.
The system was designed by looking at the requirements from the drone mapping and surveying market and building what they wished for - a small drone solution with a high-resolution camera and the ability to capture centimeter-accurate RTK data.
REAL TIME KINEMATICS BASICS
Real-time Kinematic or RTK is an advanced satellite positioning system utilizing ground station as secondary position reference to delivering highly precise centimetre-level accuracy data.
Combine and contrast position data captured from virtual or physical base station, the Phantom 4 RTK’s camera would geotag the centimetre-level precision data into the image.
Radial and tangential lens distortions were measured for every Phantom 4 RTK’s camera to have its unique distortion parameters and write these distortion parameters into the image for post-process calibration.
CENTIMETRE LEVEL POSITIONING SYSTEM
The integrated RTK module provides accurate positioning data even with no GCPs.
Stores the satellite observation data for PPK (Post-Process Kinematic) position post-process.
Compatible with the D-RTK 2 Mobile Station, NTRIP (Network Transport of RTCMv3 via Internet Protocol) and third-party RTK stations (Only PPK is available when the ground station is without the NTRIP service.)
INTEGRATED RTK MODULE
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.
Sitting just beneath the RTK receiver is a redundant GNSS module, installed to maintain flight stability in the signal-poor regions such as dense cities.
Combining both GNSS and RTK modules, the Phantom 4 RTK can optimise flight safety while ensuring the most precise data captured for technical surveying, mapping, and inspection workflows.
Enjoy stable and reliable HD live video transmission at distances of up to 4.3 miles*, the Phantom 4 RTK is great for mapping larger scale sites.
Note: 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.
PRECISE IMAGING SYSTEM
1-inch CMOS sensor, 20M effective pixels, 2.7 cm GSD (Ground Sample Distance) at 100 m flight altitude.
Radial and tangential lens distortions measured for post-processing image calibration.
The camera is synchronized with the RTK module, delivers millisecond-level imaging deviation.
Phantom 4 RTK’s camera would capture and store the phase compensation data for the post-processing position calibration
The mechanical shutter on Phantom 4 RTK’s camera eliminates rolling shutter distortions which can occur when flying at high speed, allows high-precision shots to capture without the wobble distortion.
To take full advantage of the Phantom 4 RTK's positioning modules, the new TimeSync system was created to align the flight controller, camera and RTK module continually.
Additionally, TimeSync ensures each photo uses the most accurate metadata and fixes the positioning data to the centre of the CMOS - optimizing the results from the photogrammetric methods and letting the image achieve centimetre-level positioning data.
Enable distortion correction would calibrate the optical distortion caused by the camera lens, real-time calibrated images would be captured and stored in Micro-SD card.
Disable the distortion correction would have Phantom 4 RTK's camera capture the unedited image with the fisheye effect. The lens distortion parameters were all pre-measured. These parameters would all be saved in "DewarpData" under the XMP field for every image taken.
You can also input these parameters manually to calibrate the image distortion with the third-party software. (The location of the principal point should first meet the third-party software. (The position of the primary point should first meet the third-party software's requirements to proceed. Match the imager origin point of the distortion parameter given by XMP with the principal point.) Distortion calibration using post-processing software would have better accuracy compared to the built-in distortion correction feature in the GS RTK app.
Built-in with a 5.5", 1000 cd/m² high-brightness LCD display
Interchangeable battery and antennas design
Phantom 4 RTK's remote controller has a built-in secondary battery to ensure the system would continuously operate while hot swapping external batteries
Latest OcuSync transmission system, transmission range up to 4.3 miles (unobstructed, free of interference)
The remote controller's Multi-Aircraft Control Mode can be used to coordinate the operation of up to five aircraft at the same time, enabling pilots to work efficiently
Supports 4G, Wi-Fi, and OcuSync 2.0 connectivity
Weight (Battery & Propellers Included) 1391 g
Max Service Ceiling Above Sea Level 19685 ft (6000 m)
Max Ascent Speed 5 m/s
Max Descent Speed 3 m/s
Max Speed 31 mph (50 kph) (P-mode); 36 mph (58 kph) (A-mode)
Max Flight Time Approx. 30 minutes
Operating Temperature 32° to 104° F (0° to 40° C)
Operating Frequency 2.400 GHz to 2.483 GHz (Europe, Japan, Korea)
5.725 GHz to 5.850 GHz (United States, China)
EIRP 2.4 GHz
CE (Europe) / MIC (Japan) / KCC (Korea): < 20 dBm
FCC (United States) / SRRC (China): < 26 dBm
Range RTK enabled and functioning properly:
Vertical: ±0.1 m; Horizontal: ±0.1 m
Vertical: ±0.1 m (with vision positioning); ±0.5 m (with GNSS positioning)
Horizontal: ±0.3 m (with vision positioning); ±1.5 m (with GNSS positioning)
Image Position Offset The position of the camera centre is relative to the phase centre of the onboard D-RTK
antenna under the aircraft body’s axis: (36, 0, and 192 mm) already applied to the image
coordinates in Exif data. The positive x, y, and z-axes of the aircraft body point to the
forward, rightward, and downward of the aircraft, respectively.
GPS + BeiDou + Galileo* (Asia); GPS + GLONASS + Galileo* (other regions)
Multi-Frequency Multi-System HighPrecision RTK GNSS
GPS: L1/L2; GLONASS: L1/L2; BeiDou: B1/B2; Galileo*: E1/E5a
First-Fixed Time: < 50 s
Positioning Accuracy: Vertical 1.5 cm + 1 ppm (RMS); Horizontal 1 cm + 1 ppm (RMS).
1 ppm means the error has a 1 mm increase for every 1 km of movement from the aircraft.
Velocity Accuracy: 0.03 m/s
● Mapping Functions
Mapping Accuracy** Mapping accuracy meets the requirements of the ASPRS Accuracy Standards for Digital
Orthophotos Class III.
Ground Sample Distance (GSD) (H/36.5) cm/pixel, H means the aircraft altitude relative to shooting scene (unit: m)
Acquisition Efficiency Max operating area of approx. 1 km2
for a single flight (at an altitude of 182 m, i.e., GSD is
approx. 5 cm/pixel, meeting the requirements of the ASPRS Accuracy Standards for Digital
Orthophotos Class III).
Controllable Range Pitch: -90° to +30°
● Vision System
Velocity Range ≤ 31 mph (50 kph) at 6.6 ft (2 m) above ground with adequate lighting
Altitude Range 0 - 33 ft (0 - 10 m)
Operating Range 0 - 33 ft (0 - 10 m)
Obstacle Sensory Range 2 - 98 ft (0.7 - 30 m)
Operating Environment Surfaces with clear patterns and adequate lighting (> 15 lux)
● Infrared Sensing System
Obstacle Sensory Range 0.6 - 23 ft (0.2 - 7 m)
Operating Environment Surface with diffuse reflection material, and reflectivity > 8% (such as a wall, trees, humans, etc.)
Sensor 1’’ CMOS; Effective pixels: 20M
Lens FOV (Field of View) 84°, 8.8 mm (35 mm format equivalent: 24 mm), f/2.8 - f/11, autofocus
at 1 m - ∞
ISO Range Video: 100 - 3200 (Auto), 100 - 6400 (Manual); Photo: 100 - 3200 (Auto), 100 - 12800 (Manual)
* supported later
** The actual accuracy depends on surrounding lighting and patterns, aircraft altitude, mapping software used, and other factors when
IN THE BOX
The DJI Phantom 4 RTK includes: