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2020 DJI All Rights Reserved.
AGRAS T20
User Manual
Detection Range
The obstacle detection range of the radar module is 360° in the horizontal direction and ±15° in the
vertical direction, as shown in the gure below, and the detection distance is 1.5 - 30 m. Note that the
aircraft cannot sense obstacles that are not within the detection range. Fly with caution. For the four
gray areas with an angle approx. 10° for each area in the gure, the detection performance of the radar
module may be reduced, due to the obstruction of the frame arms and landing gear. Fly with caution.
110°
10°
10°
10°
10°
50° 50°
110°
15°
±
15°
±
The effective detection distance varies depending on the size and material of the obstacle.
For example, when sensing strong reective objects such as buildings that have a radar cross
section (RCS) of more than -5 dBsm, the effective detection distance is around 20 m. When
sensing objects such as power lines that have a RCS of -10 dBsm, the distance is around 15 m.
When sensing objects such as dry tree branches that have a RCS of -15 dBsm, the distance is
around 10 m. Obstacle sensing may malfunction or be invalid in areas outside of the effective
detection distance.
Obstacle Avoidance Function Usage
Obstacle avoidance is used in the following two scenarios:
1. The aircraft begins to decelerate when it detects an obstacle is 15 m away and hovers in place when
2.5 m away from the obstacle. Users can not accelerate in the direction of the obstacle, but can y in
a direction away from the obstacle.
2. The aircraft immediately brakes and hovers if it detects an obstacle nearby. Users cannot control the
aircraft when it is braking.
When the aircraft is hovering, it is in Obstacle Avoidance mode. Users can y in a direction away from
the obstacle to exit Obstacle Avoidance mode and regain full control of the aircraft.
Altitude Stabilization Function Usage
1. Make sure that you have enabled the altitude stabilization function of the radar module in the app.
2. Enter the desired operation mode, and congure the desired spraying distance.
3. If the operating environment is ideal, the aircraft ies above the vegetation at the preset height.
Obstacle Circumvention Function Usage
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