Quick start guide
at the landing location and choose an approach direction as much against the di-
rection of the wind as possible. It will then fly downwind in the opposite direction
of the approach direction, turn 180
◦
and begin descending in the approach direc-
tion until it lands on the ground underneath the centre of the Home waypoint.
The approach angle is around 20° and the drone will reverse its thrust if needed
to maintain a suitable airspeed during this phase.
Note: There are a number of requirements that must be fulfilled
to ensure a successful Linear landing. Section ‘Linear landing’ on
page 86 describes in more detail the Linear landing process and how
to properly define approach sectors in more complex terrain. In
particular, in the case of strong-wind conditions, low light or low-
contrast terrain, the precision of the final landing location around
the Home waypoint is reduced. Therefore, it is safer to plan for more
clearance, especially along the possible landing axes.
If there are no suitable approach sectors to perform a Linear landing the drone
can also perform a Circular landing around the Home waypoint. When initiating
a Circular landing around the Home waypoint the drone will switch off its motor
and glide down while circling around the Home waypoint at the waypoint’s ra-
dius. During the Circular landing procedure the drone uses its ground sensor to
measure the height above the ground, if the ground is well textured and there is
enough light. When it reaches an altitude of 25 m above the ground the drone
will level out, estimate the direction of the wing and resume its descent so as to
touch down against the wind while remaining on the circle defined by the Home
waypoint.
Caution: The ground sensor can only provide usable feedback in
daylightconditions aboveflat terrainthat contains enough visual tex-
ture. Ifthese conditions are not met the drone cannot ensure a touch-
down against the direction of the wind. Landing in the direction
of the wind in strong-wind conditions may result in a high landing
speed and damage to the eBee RTK.
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