#define AO_CONFIG_DEFAULT_TRACKER_START_HORIZ 1000
#define AO_CONFIG_DEFAULT_TRACKER_START_VERT 100
+/* Speeds for the various modes, 2m/s seems reasonable for 'not moving' */
+#define AO_TRACKER_NOT_MOVING 200
+
+extern int32_t ao_tracker_start_latitude;
+extern int32_t ao_tracker_start_longitude;
+extern int16_t ao_tracker_start_altitude;
+
+#define AO_TRACKER_RING 8
+
+struct ao_tracker_data {
+ uint16_t tick;
+ uint8_t new;
+ uint8_t state;
+ struct ao_telemetry_location gps_data;
+ struct ao_telemetry_satellite gps_tracking_data;
+};
+
+extern struct ao_tracker_data ao_tracker_data[AO_TRACKER_RING];
+extern uint8_t ao_tracker_head;
+
+#define ao_tracker_ring_next(n) (((n) + 1) & (AO_TRACKER_RING-1))
+#define ao_tracker_ring_prev(n) (((n) - 1) & (AO_TRACKER_RING-1))
+
void
ao_tracker_init(void);