def METHOD_NAME(self):
    rospy.logwarn("[PX4-SITL] Launching")
    start_time = rospy.get_time()
    args = ["./PX4-Autopilot/build/px4_sitl_default/bin/px4-commander",
            "--instance", "0", "check"]
    while rospy.get_time() - start_time < TIMEOUT:
        process = spawn_process(args, insert_vglrun=False)
        with process.stdout:
            for line in iter(process.stdout.readline, ''):
                if ("Prearm check: OK" in line):
                    return True
        rospy.sleep(2)
    return False