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2020 DJI All Rights Reserved.
AGRAS T20
User Manual
The aircraft cannot return to the home point when the GNSS signal is weak (the GNSS
icon displays red) or is unavailable.
When the RTH altitude is set to more than 3 m and the aircraft is ascending between 3 m
and the preset RTH altitude, the aircraft stops ascending and immediately return to the
home point if the throttle stick is pushed.
Obstacle Avoidance During RTH
In an optimal operating environment, obstacle avoidance during RTH is available. If there is an obstacle
within 20 m of the aircraft, the aircraft decelerates and then stops and hovers. If the aircraft comes within
6 m of the obstacle while decelerating, the aircraft stops, ies backward to a distance of approximately 6
m from the obstacle, and hovers. The aircraft exits the RTH procedure and waits for further commands.
Landing Protection Function
Landing Protection activates during auto landing. The procedure is as follows:
1. After arriving at the home point, the aircraft descends to a position 3 m above the ground and hovers.
2. Control the pitch and roll sticks to adjust the aircraft position and make sure the ground is suitable for
landing.
3. Pull down the throttle stick or follow the onscreen instructions in the app to land the aircraft.
Low Battery and Low Voltage Warnings
The aircraft features a low battery warning, critical low battery warning, and critical low voltage warning.
1. Low Battery Warning: The aircraft status indicators slowly blink red. Fly the aircraft to a safe area and
land it as soon as possible, stop the motors, and replace the batteries.
2. Critical Battery Warning or Critical Voltage Warning (the battery voltage is lower than 47.6 V): the
aircraft status indicators rapidly blink red. The aircraft begins to descend and land automatically.
Users can set the threshold of low battery warnings in the app.
RTK Functions
The T20 has an onboard D-RTK. The heading reference of the aircraft from the dual antennas of the
onboard D-RTK is more accurate than a standard compass sensor and can withstand magnetic
interference from metal structures and high-voltage power lines. When there is a strong GNSS signal,
the dual antennas activates automatically to measure the heading of the aircraft.
The T20 supports centimeter-level positioning to improve agricultural operation when used with the DJI
D-RTK 2 Mobile Station. Follow the instructions below to use the RTK functions.
Enable/Disable RTK
Before each use, make sure that the aircraft RTK positioning function is enabled and the RTK signal
source is correctly set to either D-RTK 2 Mobile Station or Network RTK. Otherwise, RTK cannot be used
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