Maintenance, Repair and Troubleshooting
Poor GPS
coverage
∗
GPS signal coverageis low. This may be due to moun-
tains or tall buildings blocking satellite signals. If cov-
erage degrades any more a Critical failure will be ac-
tivated and an emergency landing will be initiated⁵⁷.
Security action (if enabled): The drone flies to-
wards the Home waypoint at an altitude defined by
the Home waypoint’s Change altitude parameter (by
default, set to ‘Highest’).
User action: If this occurs once or twice, click ‘ACK
WARNING’and continue normal flight. If this warning
appears more often, land as soon as possible and wait
for better conditions for satellite signal reception. Al-
ternatively, move away from objects that may disturb
satellite signals such as mountains or cellular anten-
nas.
Data uplink lost
∗∗
(if enabled)
This warning occurs if the eBee does not receive any
data from eMotion for more than 30 s. This can be
due to a large distance between drone and ground
station, a problem with the USB ground modem, an-
tenna positioning or interference. .
Security action (if enabled): The drone flies to-
wards the Home waypoint at an altitude defined by
the Home waypoint’s Change altitude parameter (by
default, set to Highest).
User action: Try to improve radio signal quality by
following the instructions in section ‘Improving radio
signal communication’ on page 158.
⁵⁷ see section ‘Critical failures’ on page 155
152
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