1963 - Launch Vehicle: Martlet. Test mission Agency: HARP. Apogee: 80 km (49 mi).

1963 June 18 - Launch Vehicle: Martlet. Test mission Agency: HARP. Apogee: 92 km (57 mi).

1963 September 5 - Launch Vehicle: Martlet. Test mission Agency: HARP. Apogee: 100 km (60 mi). The Martlet 3A gun-launched rocket program began in the spring of 1963 with test flights beginning in September. Early Martlet 3A test flights were less then successful. At launch loads of 5000-6000 g’s the rocket motor fuel grain would fail.The Martlet 3A set a world record as the largest rocket launched from a gun.

1964 January 1 - Launch Vehicle: Martlet. Test mission Agency: HARP. Apogee: 80 km (49 mi).

1965 June 3 - 20:54 GMT - Launch Vehicle: Martlet. Ionosphere mission Agency: HARP. Apogee: 105 km (65 mi).

1965 June 5 - 20:20 GMT - Launch Vehicle: Martlet. Ionosphere mission Agency: HARP. Apogee: 120 km (70 mi).

1965 June 5 - 22:43 GMT - Launch Vehicle: Martlet. Ionosphere mission Agency: HARP. Apogee: 117 km (72 mi).

1965 July 1 - Launch Vehicle: Martlet. Ionosphere mission Agency: HARP. Apogee: 150 km (90 mi).

1965 September 20 - 23:30 GMT - Launch Vehicle: Martlet. Aeronomy mission Agency: HARP. Apogee: 80 km (49 mi).

1965 September 21 - 00:52 GMT - Launch Vehicle: Martlet. Aeronomy mission Agency: HARP. Apogee: 80 km (49 mi).

1965 September 21 - 04:24 GMT - Launch Vehicle: Martlet. Aeronomy mission Agency: HARP. Apogee: 80 km (49 mi).

1965 September 21 - 07:35 GMT - Launch Vehicle: Martlet. Aeronomy mission Agency: HARP. Apogee: 80 km (49 mi).

1965 September 21 - 09:00 GMT - Launch Vehicle: Martlet. Aeronomy mission Agency: HARP. Apogee: 80 km (49 mi).

1965 September 22 - 23:24 GMT - Launch Vehicle: Martlet. Aeronomy mission Agency: HARP. Apogee: 80 km (49 mi).

1965 September 23 - 05:50 GMT - Launch Vehicle: Martlet. Aeronomy mission Agency: HARP. Apogee: 80 km (49 mi).

1965 September 23 - 07:15 GMT - Launch Vehicle: Martlet. Aeronomy mission Agency: HARP. Apogee: 80 km (49 mi).

1965 September 23 - 08:07 GMT - Launch Vehicle: Martlet. Aeronomy mission Agency: HARP. Apogee: 80 km (49 mi).

1965 September 23 - 09:05 GMT - Launch Vehicle: Martlet. Aeronomy mission Agency: HARP. Apogee: 80 km (49 mi).

1966 February 2 - 17:35 GMT - Launch Vehicle: 7 inch HARP Gun. Aeronomy mission Agency: HARP. Apogee: 53 km (32 mi).

1966 February 7 - 16:00 GMT - Launch Vehicle: 7 inch HARP Gun. Aeronomy mission Agency: HARP. Apogee: 46 km (28 mi).

1966 February 11 - 16:00 GMT - Launch Vehicle: 7 inch HARP Gun. Aeronomy mission Agency: HARP. Apogee: 46 km (28 mi).

1966 February 16 - 17:00 GMT - Launch Vehicle: 7 inch HARP Gun. Aeronomy mission Agency: HARP. Apogee: 60 km (37 mi).

1966 February 20 - 21:53 GMT - Launch Vehicle: 7 inch HARP Gun. Aeronomy mission Agency: HARP. Apogee: 60 km (37 mi).

1966 February 23 - 22:38 GMT - Launch Vehicle: 7 inch HARP Gun. Aeronomy mission Agency: HARP. Apogee: 60 km (37 mi).

1966 February 24 - 03:23 GMT - Launch Vehicle: 7 inch HARP Gun. Aeronomy mission Agency: HARP. Apogee: 60 km (37 mi).

1966 February 24 - 06:16 GMT - Launch Vehicle: 7 inch HARP Gun. Aeronomy mission Agency: HARP. Apogee: 60 km (37 mi).

1966 February 24 - 16:00 GMT - Launch Vehicle: 7 inch HARP Gun. Aeronomy mission Agency: HARP. Apogee: 60 km (37 mi).