LANDING_TARGET Message

The Landmark Precision Landing System implements the MAVLink Landing Target Protocol. It transmits the LANDING_TARGET message to communicate where a landing target is relative to the vehicle.

Field Name	Type	Units	Values	Description
time_usec	uint64_t	us	Time since autopilot system boot	Timestamp for when the measurement was taken.
target_num	uint8_t	—	0 (default)	Identifier for the target.
frame	uint8_t	—	MAV_FRAME_BODY_FRD (ArduPilot) or MAV_FRAME_LOCAL_NED (PX4)	Coordinate frame for the pose fields (x, y, z, q).
angle_x	float	rad		X-axis angular offset from the image center.
angle_y	float	rad		Y-axis angular offset from the image center.
distance	float	m		Distance from the vehicle to the target.
size_x	float	rad		Angular size of the target along the image x-axis.
size_y	float	rad		Angular size of the target along the image y-axis.
x	float	m		Target x position in the specified MAV_FRAME.
y	float	m		Target y position in the specified MAV_FRAME.
z	float	m		Target z position in the specified MAV_FRAME.
q	float[4]	—	Quaternion in (w, x, y, z) order	Target orientation in the specified MAV_FRAME.
type	uint8_t	—	LANDING_TARGET_TYPE_VISION_FIDUCIAL (2)	The kind of target.
position_valid	uint8_t	—	1	Indicates whether x, y, z, q, and type are valid (1) or should be ignored (0).