LandDetector: Check each rotation angle rather than the magnitude

src/modules/land_detector/MulticopterLandDetector.cpp

@@ -111,9 +111,9 @@ bool MulticopterLandDetector::update()
 					&& _vehicleStatus.condition_global_position_valid;
 
 	// next look if all rotation angles are not moving
-	bool rotating = sqrtf(_vehicleAttitude.rollspeed*_vehicleAttitude.rollspeed + 
-				          _vehicleAttitude.pitchspeed*_vehicleAttitude.pitchspeed + 
-        				  _vehicleAttitude.yawspeed*_vehicleAttitude.yawspeed) > _params.maxRotation;
+	bool rotating = fabsf(_vehicleAttitude.rollspeed)  > _params.maxRotation ||
+				    fabsf(_vehicleAttitude.pitchspeed) > _params.maxRotation ||
+        			fabsf(_vehicleAttitude.yawspeed)   > _params.maxRotation;
 
 	// check if thrust output is minimal (about half of default)
 	bool minimalThrust = _actuators.control[3] <= _params.maxThrottle;

src/modules/land_detector/land_detector_params.c

@@ -65,7 +65,7 @@ PARAM_DEFINE_FLOAT(LNDMC_XY_VEL_MAX, 1.00f);
  *
  * @group Land Detector
  */
-PARAM_DEFINE_FLOAT(LNDMC_ROT_MAX, 15.0f);
+PARAM_DEFINE_FLOAT(LNDMC_ROT_MAX, 20.0f);
 
 /**
  * Multicopter max throttle