orbit: added telem uorb msg

msg/CMakeLists.txt

@@ -80,6 +80,7 @@ set(msg_files
 	obstacle_distance.msg
 	offboard_control_mode.msg
 	optical_flow.msg
+	orbit_status.msg
 	parameter_update.msg
 	ping.msg
 	position_controller_landing_status.msg

msg/orbit_status.msg

@@ -0,0 +1,6 @@
+uint64 timestamp # time since system start (microseconds)
+float64 radius   # Radius of the orbit circle. Positive values orbit clockwise, negative values orbit counter-clockwise. [m]
+uint8 frame      # The coordinate system of the fields: x, y, z.
+float64 x        # X coordinate of center point. Coordinate system depends on frame field: local = x position in meters * 1e4, global = latitude in degrees * 1e7.
+float64 y        # Y coordinate of center point. Coordinate system depends on frame field: local = y position in meters * 1e4, global = latitude in degrees * 1e7.
+float32 z        # Altitude of center point. Coordinate system depends on frame field.