Parrot ANAFI USA GOV, Руководство пользователя

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User Guide v6.9.0GOV – © Parrot, January 20, 2023
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If calibration is recommended, the calibration icon turns orange (each time the drone
is started) . After calibration is completed, the icon turns white.
FLAT maps
If no DTED maps are uploaded to the drone, it is not possible to know the ground
height of the target. The drone considers the ground as FLAT at the altitude of
takeoff.
-Limitations related to the use of FLAT maps:
1. Take-off altitude is considered as a reference of 0. When taking off from a
high point (a carrier for example) the coordinates will be wrong (For example: at
500m/200m, the CoT will have 125m of difference from the real ground level if we
took off from 40m high). If you are at sea, we recommend loading the DTED0 of the
area, to have the altitude 0 in the correct place.
2. If you fly below the altitude of the takeoff point (and the distance between
the drone and ground level becomes negative) then the CoT ceases to be valid.
Similarly, in DTED when you are very close to the ground (1-3m) it may happen that
the drone estimates itself "under" the ground. Ideally, you should be at least 10m
above the ground to use the CoT properly. We recommend to always fly with a DTED
map, or possibly to load the DTED0 of the area.
Measurement accuracy
Different parameters influence the accuracy of the measurement:
1. The distance between the drone and target
The smaller the distance between the drone and the target, the more accurate the
measurement.
1. The quality of the CoT calibration
(See previous paragraph)
2. The quality of the magnetometer calibration
Important : We strongly recommend performing this calibration in case of change of
location, or if the drone has been close to a metallic or magnetic mass. The
calibration must be done far from anything that could cause magnetic disturbances
(outside an armored vehicle for example)
3. The angle to the target
The shallower the angle, the less accurate the measurement is. The optimal gimbal
angle is between 17 and 60° (if you are out of the angle range, the calibration is not
possible)