extern __pdata int16_t ao_min_pres;
extern __pdata uint16_t ao_launch_time;
extern __xdata uint8_t ao_flight_force_idle;
+#ifdef USE_KALMAN
+extern __pdata int16_t ao_ground_height;
+extern __pdata int32_t ao_k_max_height;
+extern __pdata int32_t ao_k_height;
+extern __pdata int32_t ao_k_speed;
+extern __pdata int32_t ao_k_accel;
+#endif
/* Flight thread */
void