On October 15, the world leader in civil unmanned aerial vehicles and aerial photography technologies, DJI Innovations, announced the commercial version of the top fourth-generation Phantom drone. The Phantom 4 RTK is a high-precision instrument with a powerful image processing system designed to meet the specific needs of industrial users in fields such as mapping and inspection.
- New RTK module
- Centimeter positioning accuracy with the least number of control points
- Positioning accuracy in the horizontal plane: 1cm + 1md
- Accuracy positioning in the vertical plane: 1.5cm + 1md
- Absolute accuracy of the photogrammetric model in the horizontal plane: 5cm*
- New TimeSync Correction System
- New GS RTK flight planning app
- 2 planning modes
- Precise image processing system built on a 1‑inch 20MP mechanical shutter CMOS sensor
- Mobile SDK support
- OcuSync 2.0 transmission system
- Fully compatible with D‑RTK 2 mobile station
- Adapted to work in a metropolis
*When flying in sunny weather at an altitude of 100m, the pixel size on the ground (GSD) is 2.74cm.
The complete set of Phantom 4 RTK entirely depends on the tasks set by the customer (user). To order the drone, it is recommended to contact the nearest official DJI dealer, or send your contact information to the DJI team through the official website so that they can contact you.
The basic kit will include:
- Phantom 4 RTK
- Remote control with built-in 5.5‑inch ultra-bright display,
- 2 × intelligent batteries for P4 RTK,
- 1 × intelligent battery for remote control,
- charger for simultaneous charging of both batteries,
- Charger power adapter + connecting cable,
- 8 × rotors (4CW/4CCW)
- Camera hanger
- 16GB MicroSD
- Transport case
- Micro-USB cable
- USB‑C cable
- USB‑C OTG cable.
Max. service ceiling at sea level:
Max. takeoff speed:
Max. sink rate:
Max. horizontal flight speed:
50 km/h (P‑mode)
58 km/h (A‑mode)
Max. flight time:
Operating range temperatures:
Operating range frequencies:
2.400GHz — 2.483GHz (Europe, Japan, Korea)
5.725GHz — 5.850GHz (USA, China)
Transmission power (EIRP):
CE (Europe)/MIC (Japan)/KCC (Korea)：< 20dBm
SRRC (China)/FCC (USA)/(Taiwan, China): < 26dBm
Hover Accuracy Range:
RTK is enabled and working properly:
Vertical: ± 0.1m; Horizontal: ± 0.1m
Vertical: ± 0.1m (with visual positioning);
± 0.5m (with GNSS positioning)
Horizontal: ± 0.3m (with visual positioning);
± 1.5m (with GNSS positioning)
Image Position Offset:
The position of the camera center relative to the phase center of the airborne D‑RTK antenna below the axis of the drone body: (36, 0, and 192 mm) is already applied to the image coordinates in the Exif data. The positive axes X, Y and Z of the UAV body are directed forward, to the right and down, respectively.
Mapping accuracy complies with the ASPRS Accuracy Standards for Class Ⅲ Digital Orthophotos. ** Actual accuracy will vary depending on ambient light and surface texture, flight altitude, mapping software used, and other surveying factors.
Ground Pixel Size (GSD):
(H/36.5) cm/pixel, where “H” corresponds to the height of the aircraft relative to the scene being filmed. (unit: m)
Data collection efficiency:
Max. the working area in one sortie (at a height of 182m) is 1km², that is, the GSD is about 5 cm/pixel, which meets the requirements of the ASPRS accuracy standards for class Ⅲ digital orthophotos.
≤ 50km/h at 2 meters above the ground
0 — 10 meters
0 — 10 meters
from 0.7 to 30 meters
Front and rear sensors: 60°(horizontal), ±27°(vertical); bottom: 70°(forward and backward), 50°(left and right)
Forward/Reverse: 10Hz; Down: 20Hz
Conditions for normal operation:
lighting over 15 lux, landscape with a clear structure
1″ CMOS; Number of effective pixels: 20M
Angle of view (FOV) — 84°, 8.8mm/24mm (35mm equivalent format), f/2.8 — f/11, focus — from 1m — ∞
Video: 100 — 3200/6400 (Auto/Manual), Photo: 100 — 3200/12800 (Auto/Manual)
mechanical: 8 — 1/2000sec; electronic: 8 — 1/8000sec
Max. picture size:
4864 × 3648 (4:3)
5472 × 3648 (3:2)
Video recording modes:
4K: 3840×2160@30fps H.264
Supported file systems:
Supported SD cards:
MicroSD, maximum capacity: 128GB. Class 10 or UHS‑1. Required write speed ≥ 15MB/s
Working temperature range:
Working temperature range:
-10° to 40° C
Maximum charge current:
Intelligent charging station
Output voltage and current:
8.7V, 6A; 5V, 2A
Single Frequency High Sensitivity GNSS Module:
GPS + BeiDou + Galileo* (Asia)
GPS + GLONASS + Galileo* (other regions)
First stable time: < 50s
Positioning Accuracy: Vertical: 1.5cm + 1ppm (RMS)
Horizontal: 1cm + 1ppm (RMS)
1ppm implies that the error has an increase of 1mm for every 1km of movement from the UAV
tilt angle: — 90° to +30°
Max. angular velocity control:
tilt angle: 90°/sec
Angular Control Accuracy:
0.2 — 7 meters
Conditions for normal operation:
Surface with diffuse reflective material and reflectivity: > 8% (e.g. walls, trees, people, etc.)
2.400GHz — 2.483GHz (Europe, Japan, Korea)
5.725GHz — 5.850GHz (USA, China)
Transmission power (EIRP):
Max. transmission distance:
FCC: 10 km
SRRC/CE/MIC/KCC: 6 km (in interference-free zone)
5.5 inch, 1920 × 1080 resolution, 1000 cd/m² brightness, Android OS, Memory 4GB RAM + 16GB ROM
2S 7.6V 4920mAh 37.39Wh LiPo
Operating temperature range:
At the heart of the 1‑inch 20-megapixel CMOS sensor, working in tandem with a mechanical shutter that eliminates image distortion when shooting in motion, thus allowing you to implement mapping missions or regular data collection seamlessly. Thanks to its high resolution, the Phantom 4 RTK can achieve a ground pixel size (GSD) of 2.74cm from a height of 100 meters. To ensure this unparalleled accuracy, each lens goes through a rigorous calibration process that measures the radial and tangential distortion of the lens. The collected distortion parameters are stored in each image’s metadata, allowing the post-processing software to be customized for any user.
In areas where there is no RTK coverage, Phantom 4 RTK will allow you to use the kinematics in post-processing (PPK — Post Processing Kinematic) method. The drone captures raw satellite observation data as well as ephemeris data and saves them in a PPKRAW.bin file in RTCM 3.2 format. In addition, the P4 RTK converts satellite data to RINEX (Receiver Independent Exchange Format) on the fly and writes it to the RINEX.obs file.
By internally synchronizing the position of the GNSS and the camera, the Timestamp.MRK file provides an accurate record of the high-precision image position. All data related to operations is stored on the microSD card in a unique folder for each individual mission.
Phantom 4 RTK data consistency reduces data validation time and provides an efficient post-processing workflow with minimal manual adjustments.
To improve the absolute accuracy of the image metadata, a new RTK module was integrated into the drone, providing real-time centimeter accuracy in positioning the received data.
Without an RTK module, an unmanned aerial vehicle requires up to 40 ground control points (GCP) per square kilometer, which in practice is time consuming. The DJI Phantom 4 RTK has a built-in centimeter-precision RTK positioning system paired with a high-performance imaging system. Tandem potentially reduces the number of breakpoints required for “0”, saving at least 75% of installation time.
Directly below the RTK receiver is a redundant GNSS module, which is installed to ensure stable flight in places with low signal strength, such as large cities. The modular Phantom 4 RTK tandem has optimized flight safety and the most accurate data acquisition for complex surveying, mapping and inspection workflows.
The RTK module can achieve positioning accuracy of 1cm + 1ppm (horizontal), 1.5cm + 1ppm (vertical), and the Phantom 4 RTK can achieve an absolute accuracy of the photogrammetric model in the horizontal plane — 5cm* (*When flying in sunny weather at an altitude of 100m, ground pixel size (GSD) 2.74cm).
A new system for collecting accurate data — TimeSync. Provides continuous alignment of the flight controller, camera and RTK module. In addition, TimeSync ensures that each photo uses the most accurate metadata and captures it in the CMOS center, which in turn optimizes the results using photogrammetric techniques, allowing the image to match centimeter-level positioning data.
The OcuSync 2.0 video transmission system provides a stable, interference-free connection between the control equipment and the aircraft at a distance of up to 10 km with 720p video link quality, which is ideal for mapping large areas. A flight time interval of up to 30 minutes will allow pilots to complete longer missions without having to land to change batteries.
Even if one battery is not enough to cover the entire work area, after a power change, the “Operation Resumption” function will automatically resume the operation of the GS RTK application.
GS RTK App
The new GS RTK app, along with traditional flight modes, will allow pilots to control the drone more intelligently thanks to two glide modes — Photogrammetry and Waypoint Flight. Planning modes allow the user to select the drone’s flight path while adjusting overlap ratio, altitude, speed, camera settings, etc., providing an automated mapping process or workflow control as an output. Scheduled departures are easily repeatable, which makes it possible to collect the same data over different periods of time to track any changes in the controlled area.
For flight planning in the office, the GS RTK application directly downloads KML and KMZ files. The new Shutter Priority mode ensures stable exposure even when flying autonomously in strong winds.
Mobile station D‑RTK 2
The Phantom 4 RTK is fully compatible with the D‑RTK 2 mobile station, responsible for providing the drone with real-time differential data and generating an accurate geodetic solution. Rugged D‑RTK 2 construction, degree of protection IP67, coupled with the OcuSync 2.0 video transmission system, ensure users receive centimeter-accurate data even in difficult conditions.
The Phantom 4 RTK is easy to integrate into any workflow by connecting the positioning system to the D‑RTK 2 mobile station via a 4G dongle or Wi-Fi hotspot using the NTRIP protocol (Differential GPS Data Streaming over the Internet), or you can save all received data for Post Processing Kinematic post-processing (PPK).
Mobile SDK support
The Phantom 4 RTK is compatible with the DJI Mobile SDK, giving the user direct access to the drone’s features for further automation and customization via a mobile device.
Phantom 4 RTK in practice
DJI is working closely with European construction giant Strabag SE, a major player in transportation infrastructure. Using drone technology in several mapping projects since 2010 to reduce costs and improve productivity, the company has seen the benefits of using aerial imagery in 3D modeling. The DJI Phantom 4 RTK is the latest tool for doing this for the Strabag SE.
“Using drones for mapping has many benefits. Their integration has changed our workflow and simplified many operational steps,” said Thomas Groeninger, Head of Digital Asset Assessment and UAVs at Strabag SE. “Conventional survey methods also provide 3D models, but digital terrain models generated from drone data provide high point density, and therefore more detail.”
To order the drone, it is recommended to contact the nearest official DJI dealer, or send your contact information to the DJI team through the official website so that they can contact you.
- Phantom 4 RTK – 5700€
- Mobile station D‑RTK 2 – 3600€
- Phantom 4 RTK + D‑RTK 2 mobile station – 7800€
Q: How is the Phantom 4 RTK different from previous models in the Phantom series?
A: All previous models of the Phantom series have been aimed at professional photographers and drone hobbyists, the Phantom 4 RTK is designed for industrial users in fields such as high-precision mapping and inspection. The P4 RTK inherits the same camera, shape and size, and adds an RTK positioning module, a new TimeSync system, a map-friendly app, and more.
Q: What propellers does the Phantom 4 RTK have?
A: The P4 RTK is equipped with the standard 9450 props that come with the Phantom 4 Pro.
Q: Can I fly the Phantom 4 RTK in other countries and regions?
A: No, P4 RTK has specific versions for different countries and/or regions. Users can check the version code by looking it up on the product packaging, or by using the GS RTK app (under Aircraft Information + Firmware).
Q: What is the difference between Phantom 4 RTK and Phantom 4 Pro/Advanced cameras?
A: Even though all three are built on the same 1‑inch 20MP CMOS sensor, the P4 RTK camera has been improved through a new lens distortion recording process. Each P4 RTK camera goes through a calibration process that measures lens distortion and records the corresponding OPEN-CV parameters. The camera allows you to display the original images without distortion correction, and the OPEN-CV distortion parameters recorded in the XMP file can be used in post-processing.
Q: Is it possible to use the Phantom 4 Pro ND filters on the Phantom 4 RTK?
A: Yes it is possible, ND filters made for P4Pro can also be used on P4 RTK.
Q: Does the drone’s digital signal processor (DSP) support camera distortion correction?
A: No, the user can turn on dewarping in the camera, but then the image accuracy will be lower compared to dewarping in the post-processing software.
Q: What is the difference between the Phantom 4 RTK remote control and the Phantom 4 Pro remote control?
A: The P4 RTK controller received a number of changes based on the needs of industrial users, including: microSD slot, built-in speaker, hot-swappable batteries. In addition, users can connect the control equipment to the Internet to operate Network RTK with a 4G dongle. Finally, a new custom-designed GS RTK app is pre-installed on every piece of equipment, allowing the operator to start data collection tasks right out of the box.
Q: Can the P4 RTK be controlled with the Phantom 4 Pro control hardware?
Q: Is it possible to switch between FCC and CE modes?
A: Switching between modes is not available.
Q: What is the FPV distance from the Phantom 4 RTK?
A: The effective FPV distance depends on the user’s operating methods (eg antenna position) and the actual environment in the manned area. In open and open environment, the maximum FPV distance is 10km (for FCC 5.8GHz) and 6km (for CE 2.4GHz).
Q: Is it possible to continue the started mapping mission if the P4 RTK loses the video transmission signal during its execution?
A: Yes, if the video transmission signal is lost, the user can restart the equipment and continue the mission.
Q: Can P4 Pro batteries be used in Phantom 4 RTK?
A: Yes, drone batteries are fully interchangeable.
Q: How long does it take to fully charge the P4 RTK battery?
A: It takes no more than 60 minutes to fully charge.
Q: How should the battery be maintained and stored?
A: Store in a dry place. Before long-term storage, make sure that the battery is charged at 50% or more and is discharged every three months to maintain performance.
Q: Is it possible to use the drone battery in low temperatures?
A: The performance of the battery drops sharply at temperatures < ‑10°C. It is recommended to warm up the battery to 20°C before flying to reduce the effect of low temperatures.
Q: Why do batteries start to heat up after a long period of storage?
A: This is normal. When batteries are stored for a long time with more than 65% charge, an automatic discharging procedure is activated to reduce the charge level to 65%, at which point the batteries heat up.
Q: What positioning accuracy can the Phantom 4 RTK achieve?
A: P4 RTK can achieve accurate data of 1cm + 1ppm (horizontal), 1.5cm + 1ppm (vertical).
Q: What is TimeSync and how does the system ensure that every drone image is positioned accurately?
A: TimeSync is a data acquisition system that keeps the flight controller, camera and RTK module in constant alignment, then corrects the position data in the CMOS center and writes it in EXIF and XMP format.
Q: What are the differences between PPK and RTK mode? And how to use them?
A: RTK and PPK are two kinematic technologies that refer to data in different ways. While PPK provides better positioning accuracy than RTK, both achieve centimeter accuracy. RTK is recommended for users who fly in environments that allow real-time connectivity via OcuSync or 4G, preferring convenience and efficiency. For those users who do not have requirements for timeliness and / or are forced to fly in conditions without communication, the best option is PPK.
Q: In what situations are the left and right TOF and IR sensors active?
A: Currently left/right TOF and IR sensors are not active, please fly carefully.
Q: What applications have mapping and inspection function?
A: You can use the pre-installed GS RTK app for mapping and inspection. In addition, users can install applications created in the DJI Mobile SDK.
Q: Does the Phantom 4 RTK Return to Home (RTH) mode work differently from the Phantom 4 Pro?
A: No, the P4 RTK RTH mode is almost identical.
Q: Are there any restrictions regarding setting waypoints for the P4 RTK?
A: Yes, the distance between points cannot exceed 2km, the total number of points cannot exceed 99, and the length of the flight plan cannot exceed 15km.
Q: Is it possible to enter longitude and latitude values to set waypoints?
Q: What is the maximum number of boundary points supported by the GS RTK application via imported KML files?
A: The app currently supports up to 99 boundary points.
Q: What differential data formats does the Phantom 4 RTK support?
A: P4 RTK currently supports: RTCM 3.0, RTCM 3.1, MSM4 and MSM5 in RTCM3.2 format.
Q: Are the coordinates measured by the Phantom 4 RTK absolute in the coordinate system chosen by the users?
A: Yes, absolute.
Q: How to calculate the required flight altitude based on the GSD value?
A: To estimate the appropriate flight altitude, you need to refer to the equation: H = 36 * GSD. In this case, it is worth paying attention to the fact that the pixel size on the ground (GSD) is measured in centimeters, and the “H” value (height or flight height) is measured in meters.
Q: Do images captured by P4 RTK retain altitude data? If yes, how is this data stored?
A: Yes, they do. Altitude above sea level and relative altitude (relative to the user’s takeoff point). Absolute height can be used in mapping. The relative height is stored in the XMP file.
Q: How do I capture a tilted photo with the Phantom 4 RTK?
A: Oblique images can be acquired in photogrammetry mode in the GS RTK app. In Photogrammetry mode, you can adjust the gimbal angle from ‑90° to ‑45° in the camera settings for each flight plan. The user can only set one hang angle at a time. In order to get multiple angles, you need to schedule the same mission and set the desired camera angle.
Q: Is it possible to create a 3D model or a point cloud using third party software using images from P4 RTK? If so, what will be the accuracy of the resulting model?
A: Yes, it is possible. However, the accuracy will depend on the third-party photogrammetry algorithm used. To clarify the expected accuracy, please contact the software vendor.
Q: What would be the best way to use P4 RTK for corridor mapping?
A: In cases where data is collected along infrastructure or another narrow corridor, the developer recommends setting a high overlap ratio, flying above normal, and planning at least two flight paths for the same corridor.
Q: Is the Phantom 4 RTK compatible with third party base stations?
A: No, third-party base stations cannot be connected to P4 RTK or control equipment via a radio. However, it is possible to receive data from a network RTK server (network RTK) via the Ntrip protocol in a 4G/Wi-Fi network environment. Satellite observation data can also be stored in the drone for post-processing (PPK).
Video from DJI Phantom 4 RTK quadcopters.