How to get data from the topic: /ground_measurement ?

[Cristian-wp]

Hello, I am trying to read data from /ground_measurement topic, using the local planner with "local_planner_depth-camera.launch" simulation. When I try to read it, I get the following message:

~/catkin_ws$ rostopic echo /ground_measurement
WARNING: no messages received and simulated time is active.
Is /clock being published?

If I try rostopic list I can see the topic, but I can not find any code inside the package...

~/catkin_ws$ rostopic list
/adapted_waypoint
/bounding_box
/camera/depth/camera_info
/camera/depth/image_raw
/camera/depth/points
/camera/parameter_descriptions
/camera/parameter_updates
/camera/rgb/camera_info
/camera/rgb/image_raw
/camera/rgb/image_raw/compressed
/camera/rgb/image_raw/compressed/parameter_descriptions
/camera/rgb/image_raw/compressed/parameter_updates
/camera/rgb/image_raw/compressedDepth
/camera/rgb/image_raw/compressedDepth/parameter_descriptions
/camera/rgb/image_raw/compressedDepth/parameter_updates
/camera/rgb/image_raw/theora
/camera/rgb/image_raw/theora/parameter_descriptions
/camera/rgb/image_raw/theora/parameter_updates
/clicked_point
/clock
/closest_point
/complete_tree
/cost_image
/current_setpoint
/deg60_point
/diagnostics
/drone
/drone_array
/fov
/gazebo/link_states
/gazebo/model_states
/gazebo/parameter_descriptions
/gazebo/parameter_updates
/gazebo/set_link_state
/gazebo/set_model_state
/goal_position
/ground_measurement
/histogram_image
/input/goal_position
/local_planner_manager/bond
/local_planner_nodelet/parameter_descriptions
/local_planner_nodelet/parameter_updates
/local_pointcloud
/mavlink/from
/mavlink/to
/mavros/actuator_control
/mavros/adsb/send
/mavros/adsb/vehicle
/mavros/altitude
/mavros/battery
/mavros/cam_imu_sync/cam_imu_stamp
/mavros/companion_process/status
/mavros/debug_value/debug
/mavros/debug_value/debug_vector
/mavros/debug_value/named_value_float
/mavros/debug_value/named_value_int
/mavros/debug_value/send
/mavros/estimator_status
/mavros/extended_state
/mavros/fake_gps/mocap/tf
/mavros/global_position/compass_hdg
/mavros/global_position/global
/mavros/global_position/gp_lp_offset
/mavros/global_position/gp_origin
/mavros/global_position/home
/mavros/global_position/local
/mavros/global_position/raw/fix
/mavros/global_position/raw/gps_vel
/mavros/global_position/raw/satellites
/mavros/global_position/rel_alt
/mavros/global_position/set_gp_origin
/mavros/gps_rtk/send_rtcm
/mavros/hil/actuator_controls
/mavros/hil/controls
/mavros/hil/gps
/mavros/hil/imu_ned
/mavros/hil/optical_flow
/mavros/hil/rc_inputs
/mavros/hil/state
/mavros/home_position/home
/mavros/home_position/set
/mavros/imu/data
/mavros/imu/data_raw
/mavros/imu/diff_pressure
/mavros/imu/mag
/mavros/imu/static_pressure
/mavros/imu/temperature_baro
/mavros/imu/temperature_imu
/mavros/landing_target/lt_marker
/mavros/landing_target/pose
/mavros/landing_target/pose_in
/mavros/local_position/accel
/mavros/local_position/odom
/mavros/local_position/pose
/mavros/local_position/pose_cov
/mavros/local_position/velocity_body
/mavros/local_position/velocity_body_cov
/mavros/local_position/velocity_local
/mavros/log_transfer/raw/log_data
/mavros/log_transfer/raw/log_entry
/mavros/manual_control/control
/mavros/manual_control/send
/mavros/mission/reached
/mavros/mission/waypoints
/mavros/mocap/tf
/mavros/mount_control/command
/mavros/mount_control/orientation
/mavros/obstacle/send
/mavros/odometry/in
/mavros/odometry/out
/mavros/onboard_computer/status
/mavros/param/param_value
/mavros/px4flow/ground_distance
/mavros/px4flow/raw/optical_flow_rad
/mavros/px4flow/raw/send
/mavros/px4flow/temperature
/mavros/radio_status
/mavros/rc/in
/mavros/rc/out
/mavros/rc/override
/mavros/setpoint_accel/accel
/mavros/setpoint_attitude/cmd_vel
/mavros/setpoint_attitude/thrust
/mavros/setpoint_position/global
/mavros/setpoint_position/global_to_local
/mavros/setpoint_position/local
/mavros/setpoint_raw/attitude
/mavros/setpoint_raw/global
/mavros/setpoint_raw/local
/mavros/setpoint_raw/target_attitude
/mavros/setpoint_raw/target_global
/mavros/setpoint_raw/target_local
/mavros/setpoint_trajectory/desired
/mavros/setpoint_trajectory/local
/mavros/setpoint_velocity/cmd_vel
/mavros/setpoint_velocity/cmd_vel_unstamped
/mavros/state
/mavros/statustext/recv
/mavros/statustext/send
/mavros/target_actuator_control
/mavros/time_reference
/mavros/timesync_status
/mavros/trajectory/desired
/mavros/trajectory/generated
/mavros/trajectory/path
/mavros/vfr_hud
/mavros/vision_pose/pose
/mavros/vision_pose/pose_cov
/mavros/vision_speed/speed_vector
/mavros/wind_estimation
/move_base_simple/goal
/original_waypoint
/path_actual
/path_adapted_waypoint
/path_waypoint
/path_waypoint_array
/pointcloud_size
/range_scan
/rosout
/rosout_agg
/smoothed_waypoint
/tf
/tf_static
/tree_path
/world

Is a future feature? Is deprecated?

Thanks in advance.