px4-firmware/msg/VehicleGlobalPosition.msg

# Fused global position in WGS84.
# This struct contains global position estimation. It is not the raw GPS
# measurement (@see vehicle_gps_position). This topic is usually published by the position
# estimator, which will take more sources of information into account than just GPS,
# e.g. control inputs of the vehicle in a Kalman-filter implementation.
#

uint64 timestamp		# time since system start (microseconds)
uint64 timestamp_sample         # the timestamp of the raw data (microseconds)

float64 lat			# Latitude, (degrees)
float64 lon			# Longitude, (degrees)
float32 alt			# Altitude AMSL, (meters)
float32 alt_ellipsoid		# Altitude above ellipsoid, (meters)

float32 delta_alt 	# Reset delta for altitude
uint8 lat_lon_reset_counter	# Counter for reset events on horizontal position coordinates
uint8 alt_reset_counter 	# Counter for reset events on altitude

float32 eph			# Standard deviation of horizontal position error, (metres)
float32 epv			# Standard deviation of vertical position error, (metres)

float32 terrain_alt		# Terrain altitude WGS84, (metres)
bool terrain_alt_valid		# Terrain altitude estimate is valid

bool dead_reckoning		# True if this position is estimated through dead-reckoning

# TOPICS vehicle_global_position vehicle_global_position_groundtruth external_ins_global_position
# TOPICS estimator_global_position
# TOPICS aux_global_position