+#if HAS_GYRO
+extern __pdata accel_t ao_ground_accel_along;
+extern __pdata accel_t ao_ground_accel_across;
+extern __pdata accel_t ao_ground_accel_through;
+extern __pdata gyro_t ao_ground_pitch;
+extern __pdata gyro_t ao_ground_yaw;
+extern __pdata gyro_t ao_ground_roll;
+#endif