Support for P4 Multispectral

The multispectral imaging system of the P4 Multispectral detects light emissivity of different objects, which is captured by each of the cameras and analyzed to calculate vegetation index values. A common index used in the agriculture and forestry industry for plant health is NDVI. Meanwhile, the spectral sunlight sensor atop the drone compensates for the sunlight received throughout different times of day, improving the consistency of the data captured over the same field of vegetation.

"Blue (B): 450 nm ± 16 nm, green (G): 560 nm ± 16 nm, red (R): 650 nm ± 16 nm, red edge (RE): 730 nm ± 16 nm, near-infrared (NIR): 840 nm ± 26 nm.
Each Sensor: Effective pixels 2.08 MP (2.12 MP in total) "

All the camera lenses have a focal length of 5.74 mm, and the 35 mm equivalent focal length is 40 mm.

Your images go through radiometric calibration when you process them through the vegetation index features in DJI GS Pro and DJI Terra.

Yes. The positions of the centers of the six cameras’ CMOS relative to the phase center of the onboard D-RTK antenna have been calibrated and are recorded in the EXIF data of each image.

The original images are not corrected for distortion, but each camera lens has gone through distortion measurement during the production process, with the parameters recorded within each of the images.

The original images are not corrected for vignetting, but the parameters for vignetting correction are recorded within each of the images.

Yes.

Yes. Please refer to the user manual when choosing an SD card.

All P4M aircraft go through a standard camera and sensor calibration process as part of DJI’s production standards, minimizing differences between drones.

DN values.

Currently, the P4 Multispectral is only compatible with the SDK Remote Controller that comes with the aircraft.

You will be able to link the aircraft and a Phantom 4 Series remote controller, but you will not be able to control the P4 Multispectral if you’re not using a compatible remote controller. You can use the P4 Multispectral remote controller with the Phantom 4 RTK, but not the other way around.

NCC / FCC: 7 km; SRRC / CE / MIC / KCC: 5 km (Unobstructed, free of interference)

720p.

Yes.

A new battery lasts around 27 minutes.

Around 58 minutes.

You can run firmware upgrades using DJI Assistant 2 for Phantom.Follow instructions here and in the user manual.

The operating app that comes with the aircraft, DJI GS Pro, can be used to plan flights and execute flight missions.

DJI GS Pro uses Apple Maps.

There is no limit on the number of waypoints in each flight mission, but the aircraft can only perform actions at up to 99 waypoints. When a flight mission has more than 99 waypoints, DJI GS Pro will automatically section the waypoints into groups, each containing a maximum of 99 waypoints.

"Flight height: Maximum: 500 m, minimum: 1 m.
Flight speed: Maximum: 15 m/s, minimum: 1 m/s. "

You can switch between RGB and NDVI live feeds in manual mode. We recommend that you stay in the RGB view and do not switch between feeds during a flight mission. The JPEG images will automatically be saved in either RGB or NDVI based on the camera mode. Most third-party mapping software will require RGB images for aerial triangulation before stitching NDVI maps.

For beginner users, we recommend setting the multispectral shooting mode to Auto, choose Average Metering as the metering mode, and choose AE unlock.

Support for DJI Mobile SDK is coming soon.

DJI Terra supports NDVI, GNDVI, NDRE, LCI, and OSAVI, but does not have a vegetation index calculator function.

The data from the multispectral bands captured by the P4 Multispectral can be used for a variety of crops or vegetation. Use DJI Terra or third-party software to reconstruct vegetation index maps like NDVI or NDRE maps that help you monitor plant health.

Yes, you can plan flight missions and execute them repeatedly using GS Pro.

Yes.

The GSD for the P4 Multispectral is (H/18.9) cm/pixel. You can calculate the height of your flight mission based on the accuracy needed.

The P4 Multispectral has a max mapping area of approx. 0.47 km2 for a single flight at an altitude of 180 m, i.e., GSD is approximately 9.52 cm/pixel.

Relative altitude (relative to your takeoff point) information is stored in the photos captured at waypoints.

No, you cannot connect third-party base stations to the P4 Multispectral or the remote controller via a radio station. However, you can obtain data from a network RTK server via NTRIP protocol in 4G/Wi-Fi network environment. Satellite observation data can also be saved in the aircraft for users to conduct post processed kinematics (PPK) to complete their tasks.