The recovery operation of sounding rocket of ISAS takes much time and cost due to its long down range, amounted to approximately 300km off shore. The recovery system using aliging parachute is expected to be a hopeful candidate because of its maneuverability and high-glide performance. ISAS has been so far developign it htrough wind tunnel tests with sub-scaled model and drop test from helicopter at low altitude with full-scaled model. In June 1994, the opportunity was took for the automomous flight test of recovery system with gliding parachute, released from balloon at altitude of about 8km. The autonomous flight control was carried out during descent by the on-boarded computer with GPS data and geomagnetic attitude data. The control was proportional to the directional deviation between the present attitude and the target. It was satisfactory below the altitude of 2km. In this paper the experiment using balloon was described in detail and the results obtained were also reported.
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