1960 April 18 - 23:09 GMT - Launch Vehicle: Scout. Scout X SX-1 FAILURE: Vehicle broke up after first-stage burnout. Cub Scout test Agency: NASA. Apogee: 48 km (29 mi). Scout test vehicle, with live first and third stages. Suborbital.

1960 July 2 - 00:04 GMT - Launch Vehicle: Scout. Scout X-1 ST-1 FAILURE: Failure. Test mission Agency: NASA. Apogee: 1,380 km (850 mi).

1960 October 4 - 15:23 GMT - Launch Vehicle: Scout. Scout X-1 ST-2 Radiation Probe Plasma mission Agency: NASA. Apogee: 5,600 km (3,400 mi).

1960 December 4 - 21:14 GMT - Launch Vehicle: Scout. Scout X-1 ST-3 FAILURE: Second stage malfunction. Explorer (9) S 56 Mass: 6.00 kg (13.20 lb). Spacecraft: S-56. Agency: NASA.

1961 February 16 - 13:05 GMT - Launch Vehicle: Scout. Scout X-1 ST-4 Explorer 9 Mass: 7.00 kg (15.40 lb). Spacecraft: S-56. Agency: U.S. Air Force. Perigee: 757 km (470 mi). Apogee: 2,433 km (1,511 mi). Inclination: 38.80 deg. Period: 118.00 min. 12 foot dia. balloon; atmospheric density studies. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1961 June 30 - 17:09 GMT - Launch Vehicle: Scout. Scout X-1 ST-5 FAILURE: Third stage did not ignite, and the vehicle was destroyed. Explorer (13) S 55 Mass: 84 kg (185 lb). Spacecraft: S-55. Agency: NASA. Apogee: 172 km (106 mi). Micrometeorite counter satellite (S-55).

1961 August 25 - 18:29 GMT - Launch Vehicle: Scout. Scout X-1 ST-6 FAILURE: Partial Failure. Explorer 13 Mass: 86 kg (189 lb). Spacecraft: S-55. Agency: NASA. Perigee: 125 km (77 mi). Apogee: 1,164 km (723 mi). Inclination: 37.70 deg. Period: 97.50 min. Useless orbit; micrometeoroid research. Partial Failure.

1961 October 19 - 17:38 GMT - Launch Vehicle: Scout. Scout X-1 ST-7 P-21 Plasma / aeronomy mission Agency: NASA. Apogee: 6,855 km (4,259 mi).

1962 March 1 - 05:07 GMT - Launch Vehicle: Scout. Scout X-1A ST-8 Reentry 1 re-entry vehicle test flight Agency: NASA. Apogee: 214 km (132 mi).

1962 March 29 - 07:27 GMT - Launch Vehicle: Scout. Scout X-2-1C ST-9 P-21A Plasma / aeronomy mission Agency: NASA. Apogee: 6,291 km (3,909 mi).

1962 August 31 - Launch Vehicle: Scout. Scout X-3A S114 FAILURE: Late stage 3 ignition. Reentry 2 Agency: NASA. Apogee: 217 km (134 mi).

1962 December 16 - 14:33 GMT - Launch Vehicle: Scout. Scout X-3 S115 Explorer 16 Mass: 100 kg (220 lb). Spacecraft: S-55. Agency: NASA. Perigee: 744 km (462 mi). Apogee: 1,159 km (720 mi). Inclination: 52.00 deg. Period: 104.10 min. Micrometeoroid data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1963 May 22 - 04:38 GMT - Launch Vehicle: Scout. Scout X-3 S116 RFD-1 re-entry vehicle test flight Agency: NASA. Apogee: 145 km (90 mi).

1963 June 28 - 21:19 GMT - Launch Vehicle: Scout. Scout X-4 S113 GRS Mass: 99 kg (218 lb). Spacecraft: GRS. Agency: USAF AFC. Perigee: 413 km (256 mi). Apogee: 1,306 km (811 mi). Inclination: 49.70 deg. Period: 102.10 min. Geophysical Research Satellite; space gas data. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

1963 July 20 - 05:44 GMT - Launch Vehicle: Scout. Scout X-3A S110 FAILURE: Failure. Reentry 3 re-entry vehicle test flight Agency: NASA. Apogee: 2.00 km (1.20 mi). NASA launched a Scout rocket with a nose cone of experimental heatshield material from Wallops Island, Va. The rocket was intentionally destroyed when it deviated from its course a few seconds after liftoff. The nose cone had been expected to reenter the atmosphere at 27,934 kilometers (18,600 miles) per hour to test the material's thermal performance under heating loads near those of a lunar reentry.

1964 March 27 - 17:25 GMT - Launch Vehicle: Scout. Scout X-3 S127R Ariel 2 Mass: 68 kg (149 lb). Spacecraft: Ariel. Agency: UK DSIR. Perigee: 287 km (178 mi). Apogee: 1,349 km (838 mi). Inclination: 51.70 deg. Period: 101.30 min. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1964 August 18 - 06:05 GMT - Launch Vehicle: Scout. Scout X-4A S129R Reentry 4A Agency: NASA. Apogee: 183 km (113 mi). Scout launch tested Apollo-type ablator materials at lunar reentry heating levels.

1964 November 6 - 12:02 GMT - Launch Vehicle: Scout. Scout X-4 S133R Explorer 23 Mass: 134 kg (295 lb). Spacecraft: S-55. Agency: NASA LaR. Perigee: 463 km (287 mi). Apogee: 980 km (600 mi). Inclination: 51.90 deg. Period: 99.20 min. Micrometeoroid data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1970 March 7 - 18:36 GMT - Launch Vehicle: Apache. Nike Apache NASA 14.457CI Eclipse aeronomy mission Agency: NASA. Apogee: 200 km (120 mi).

1970 March 7 - 18:37 GMT - Launch Vehicle: Nike. Nike Iroquois CRL A07.902-9 Mass spectrometer Eclipse aeronomy mission Agency: USAF. Apogee: 76 km (47 mi).

1970 March 7 - 18:39 GMT - Launch Vehicle: Nike. Nike Iroquois CRL A07.902-5 Mass spectrometer Eclipse aeronomy mission Agency: USAF. Apogee: 113 km (70 mi).