1962 April 26 - Launch Vehicle: Scout. Scout X-2 S111 FAILURE: Failure. Solrad 4B Mass: 91 kg (200 lb). Spacecraft: GRAB. Agency: U.S. Navy. Solar radiation monitor.

1962 May 24 - Launch Vehicle: Scout. Scout X-2M S112 FAILURE: Failure. P 35-1 Spacecraft: Program 35. Agency: AFSC. Military weather satellite to provide targetting information for reconnaisance satellites.

1962 August 23 - 11:44 GMT - Launch Vehicle: Scout. Scout X-2M S117 P 35-2 Mass: 91 kg (200 lb). Spacecraft: Program 35. Agency: U.S. Air Force. Perigee: 578 km (359 mi). Apogee: 752 km (467 mi). Inclination: 98.50 deg. Period: 98.10 min. Military weather satellite to provide targetting information for reconnaisance satellites.

1962 December 19 - 01:25 GMT - Launch Vehicle: Scout. Scout X-3 S118 Transit 5A Mass: 61 kg (134 lb). Spacecraft: Transit. Agency: U.S. Navy. Perigee: 336 km (208 mi). Apogee: 347 km (215 mi). Inclination: 90.60 deg. Period: 91.40 min. First operational solar-powered prototype; failed first day. The satellite verified a new technique for deploying the solar panels and for separating from the rocket, but otherwise it was not successful because of trouble with the power system.

1963 February 19 - 16:33 GMT - Launch Vehicle: Scout. Scout X-3M S126 P 35-3 Mass: 40 kg (88 lb). Spacecraft: Program 35. Agency: USAF. Perigee: 488 km (303 mi). Apogee: 810 km (500 mi). Inclination: 100.50 deg. Period: 97.80 min. Military weather satellite to provide targetting information for reconnaisance satellites.

1963 April 5 - 03:01 GMT - Launch Vehicle: Scout. Scout X-3 S119 FAILURE: Failure. Transit 5A-2 Mass: 84 kg (185 lb). Spacecraft: Transit. Agency: U.S. Air Force. Replacement for the failed Transit 5A; failed to reach orbit.

1963 April 26 - Launch Vehicle: Scout. Scout X-2M S121 FAILURE: Failure. P 35-4 Spacecraft: Program 35. Agency: U.S. Air Force. Military weather satellite to provide targetting information for reconnaisance satellites.

1963 June 16 - 01:49 GMT - Launch Vehicle: Scout. Scout X-3 S120 Transit 5A-3 Mass: 55 kg (121 lb). Spacecraft: Transit. Agency: USN. Perigee: 350 km (210 mi). Apogee: 360 km (220 mi). Inclination: 89.80 deg. Period: 91.60 min. First operational prototype with a redesigned power supply. A malfunction of the memory occurred during powered flight that kept it from accepting and storing navigation messages, and the oscillator stability was degraded during launch. The satellite could not be used for navigation, but it was the first to achieve gravity-gradient stabilization, and its other subsystems performed well.

1963 September 27 - 11:17 GMT - Launch Vehicle: Scout. Scout X-2B S132 FAILURE: Failure. P 35-5 Mass: 40 kg (88 lb). Spacecraft: Program 35. Agency: U.S. Air Force. Military weather satellite to provide targetting information for reconnaisance satellites.

1963 December 19 - 18:49 GMT - Launch Vehicle: Scout. Scout X-4 S122R Explorer 19 Mass: 7.00 kg (15.40 lb). Spacecraft: ADE. Agency: NASA LaR. Perigee: 597 km (370 mi). Apogee: 2,391 km (1,485 mi). Inclination: 78.60 deg. Period: 115.90 min. 12 foot dia. balloon; identical to Explorer 9; atmospheric density studies. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1964 June 4 - 03:50 GMT - Launch Vehicle: Scout. Scout X-4 S125R Transit 5C-1 Mass: 54 kg (119 lb). Spacecraft: Transit. Agency: USN. Perigee: 825 km (512 mi). Apogee: 898 km (557 mi). Inclination: 90.50 deg. Period: 102.20 min. Operational prototype similar to the 5A series but with some redesign to improve performance. Operated successfully until 23 August 1965.

1964 June 25 - 01:40 GMT - Launch Vehicle: Scout. Scout X-4 S128R FAILURE: Second stage exploded. ESRS Mass: 79 kg (174 lb). Spacecraft: ESRS. Agency: U.S. Air Force. Environmental Sciences Research Satellite.

1964 August 25 - 13:43 GMT - Launch Vehicle: Scout. Scout X-4 S134R Explorer 20 Mass: 44 kg (97 lb). Spacecraft: IE. Agency: NASA GSF. Perigee: 857 km (532 mi). Apogee: 999 km (620 mi). Inclination: 79.90 deg. Period: 103.60 min. Ionospheric research. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1964 October 10 - 03:00 GMT - Launch Vehicle: Scout. Scout X-4 S123R Explorer 22 Mass: 52 kg (114 lb). Spacecraft: Beacon. Agency: NASA GSF. Perigee: 872 km (541 mi). Apogee: 1,053 km (654 mi). Inclination: 79.70 deg. Period: 104.30 min. Ionospheric and geodetic data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space.

1964 November 21 - 17:09 GMT - Launch Vehicle: Scout. Scout X-4 S135R Explorer 24 Mass: 9.00 kg (19.80 lb). Spacecraft: ADE. Agency: NASA LaR. Perigee: 530 km (320 mi). Apogee: 2,498 km (1,552 mi). Inclination: 81.40 deg. Period: 116.30 min. 12 foot dia. balloon; atmospheric density studies. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1965 December 6 - 21:05 GMT - Launch Vehicle: Scout. Scout X-4 S139R FRANCE 1 Mass: 60 kg (132 lb). Spacecraft: FRANCE. Agency: CNES. Perigee: 696 km (432 mi). Apogee: 707 km (439 mi). Inclination: 75.90 deg. Period: 98.80 min. VLF wave propagation studies. Investigation of the properties of the ionized layers of the atmosphere by observation of the propagation of the properties of very low frequency waves in the ionosphere. First registered by the United States in A/AC.105/INF.125. Orbit given there was 99 .9 min, 749 x 753 km x 75.9 deg, with note: France provided the payload for 1965-101A.

1965 December 22 - 04:33 GMT - Launch Vehicle: Scout. Scout A S140C Transit O-6 Mass: 60 kg (132 lb). Spacecraft: Transit. Agency: USN. Perigee: 891 km (553 mi). Apogee: 1,059 km (658 mi). Inclination: 89.10 deg. Period: 104.60 min. Spacecraft built by Naval Avionics Facility, but refurbished by APL. Operated for 7 to 11 months, but then failed due to poor workmanship of NAFI components.

1966 January 28 - 17:06 GMT - Launch Vehicle: Scout. Scout A S142C Transit O-7 Mass: 50 kg (110 lb). Spacecraft: Transit. Agency: USN. Perigee: 850 km (520 mi). Apogee: 1,180 km (730 mi). Inclination: 90.00 deg. Period: 105.40 min. Naval Avionics Facility-assembled production spacecraft. Failed after a few weeks operation.

1966 March 26 - 03:31 GMT - Launch Vehicle: Scout. Scout A S143C Transit O-8 Mass: 50 kg (110 lb). Spacecraft: Transit. Agency: USN. Perigee: 879 km (546 mi). Apogee: 1,099 km (682 mi). Inclination: 89.70 deg. Period: 104.90 min. Spacecraft built by Naval Avionics Facility, but refurbished by APL. Operated for 7 to 11 months, but then failed due to poor workmanship of NAFI components.

1966 April 22 - 09:45 GMT - Launch Vehicle: Scout. Scout B S145C OV3-01 Mass: 69 kg (152 lb). Spacecraft: OV3. Agency: USAF OAR. Perigee: 341 km (211 mi). Apogee: 3,585 km (2,227 mi). Inclination: 82.40 deg. Period: 126.40 min. Radiation data. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

1966 May 19 - 02:27 GMT - Launch Vehicle: Scout. Scout A S146C Transit O-9 Mass: 50 kg (110 lb). Spacecraft: Transit. Agency: USN. Perigee: 833 km (517 mi). Apogee: 951 km (590 mi). Inclination: 90.10 deg. Period: 102.80 min. Spacecraft built by Naval Avionics Facility, but refurbished by APL. Operated for 7 to 11 months, but then failed due to poor workmanship of NAFI components.

1966 August 4 - 10:45 GMT - Launch Vehicle: Scout. Scout B S148C OV3-03 Mass: 75 kg (165 lb). Spacecraft: OV3. Agency: USAF OAR. Perigee: 349 km (216 mi). Apogee: 3,141 km (1,951 mi). Inclination: 81.40 deg. Period: 121.40 min. Radiation measurements. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

1966 August 18 - 02:25 GMT - Launch Vehicle: Scout. Scout A S149C Transit O-10 Mass: 58 kg (127 lb). Spacecraft: Transit. Agency: USN. Perigee: 1,038 km (644 mi). Apogee: 1,089 km (676 mi). Inclination: 88.90 deg. Period: 106.50 min. Spacecraft built by Naval Avionics Facility, but refurbished by APL. Only partially operational due to a decrease in the number of solar cells available for charging the batteries after thermal working of the solar cell interconnections in day/night cycles.

1966 October 28 - 11:56 GMT - Launch Vehicle: Scout. Scout B S150C OV3-02 Mass: 82 kg (180 lb). Spacecraft: OV3. Agency: USAF OAR. Perigee: 319 km (198 mi). Apogee: 1,599 km (993 mi). Inclination: 81.90 deg. Period: 104.20 min. Radiation data. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

1967 January 31 - 12:45 GMT - Launch Vehicle: Scout. Scout B S151C FAILURE: Failure. OV3-05 Spacecraft: OV3. Agency: AFSC.

1967 April 14 - 03:25 GMT - Launch Vehicle: Scout. Scout A S154C Transit O-12 Mass: 60 kg (132 lb). Spacecraft: Transit. Agency: USN. Perigee: 1,037 km (644 mi). Apogee: 1,064 km (661 mi). Inclination: 90.10 deg. Period: 106.20 min. First APL-built Transit Operational satellite. Operational life of this and subsequent Transits was over 14 years.

1967 May 5 - 16:00 GMT - Launch Vehicle: Scout. Scout A S155C Ariel 3 Mass: 90 kg (198 lb). Spacecraft: Ariel. Agency: UK SRC. Perigee: 499 km (310 mi). Apogee: 604 km (375 mi). Inclination: 80.60 deg. Period: 95.60 min. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1967 May 18 - 09:05 GMT - Launch Vehicle: Scout. Scout A S156C Transit O-13 Mass: 60 kg (132 lb). Spacecraft: Transit. Agency: USN. Perigee: 1,059 km (658 mi). Apogee: 1,088 km (676 mi). Inclination: 89.60 deg. Period: 106.70 min. Operational life over 20 years.

1967 May 30 - 02:06 GMT - Launch Vehicle: Scout. Scout B S152C FAILURE: Third stage failure. ESRO 2A Mass: 74 kg (163 lb). Spacecraft: ESRO. Agency: ESRO.

1967 September 25 - 08:25 GMT - Launch Vehicle: Scout. Scout A S157C Transit O-14 Mass: 60 kg (132 lb). Spacecraft: Transit. Agency: USN. Perigee: 1,030 km (640 mi). Apogee: 1,099 km (682 mi). Inclination: 89.20 deg. Period: 106.50 min.

1967 December 5 - 01:03 GMT - Launch Vehicle: Scout. Scout B S158C OV3-06 Mass: 95 kg (209 lb). Spacecraft: OV3. Agency: USAF OAR. Perigee: 409 km (254 mi). Apogee: 443 km (275 mi). Inclination: 90.00 deg. Period: 93.00 min. Ionospheric studies. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

1968 March 2 - 03:55 GMT - Launch Vehicle: Scout. Scout A S162C Transit O-18 Mass: 60 kg (132 lb). Spacecraft: Transit. Agency: USN. Perigee: 1,014 km (630 mi). Apogee: 1,130 km (700 mi). Inclination: 90.00 deg. Period: 106.70 min. First RCA-built Transit.

1968 May 17 - 02:06 GMT - Launch Vehicle: Scout. Scout B S161C ESRO 2B Mass: 75 kg (165 lb). Spacecraft: ESRO. Agency: ESRO EST. Perigee: 334 km (207 mi). Apogee: 1,085 km (674 mi). Inclination: 97.20 deg. Period: 99.00 min.

1968 August 8 - 20:12 GMT - Launch Vehicle: Scout. Scout B S165C Explorer 39 Mass: 9.00 kg (19.80 lb). Spacecraft: ADE. Agency: NASA LaR. Perigee: 670 km (410 mi). Apogee: 2,538 km (1,577 mi). Inclination: 80.70 deg. Period: 118.30 min. Air Density Explorer; atmospheric density and temperature data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1968 October 3 - 20:49 GMT - Launch Vehicle: Scout. Scout B S167C ESRO 1A Mass: 81 kg (178 lb). Spacecraft: ESRO. Agency: ESRO. Perigee: 258 km (160 mi). Apogee: 1,538 km (955 mi). Inclination: 93.80 deg. Period: 103.00 min. Aurora, polar ionosphere investigations.

1969 October 1 - 22:29 GMT - Launch Vehicle: Scout. Scout B S172C FAILURE: Partial Failure. ESRO 1B Mass: 80 kg (176 lb). Spacecraft: ESRO. Agency: ESRO. Perigee: 298 km (185 mi). Apogee: 378 km (234 mi). Inclination: 85.00 deg. Period: 91.30 min. Ionospheric and auroral investigations; lower than planned orbit. Fourth satellite of ESRO. Also registered by the United States in A/AC.105/INF.220 as United States space object 1969-83A, with category B and orbital parameters 90.6 min, 280 x 339 km x 85.1 deg.

1969 November 8 - 01:52 GMT - Launch Vehicle: Scout. Scout B S169C Azur Mass: 71 kg (156 lb). Spacecraft: AZUR. Agency: DFVLR. Perigee: 373 km (231 mi). Apogee: 2,127 km (1,321 mi). Inclination: 102.70 deg. Period: 110.50 min. German Research Satellite A; examined Van Allen belts, solar particles, aurora. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1970 August 27 - 13:23 GMT - Launch Vehicle: Scout. Scout A S176C Transit O-19 Mass: 18 kg (39 lb). Spacecraft: Transit. Agency: USN. Perigee: 946 km (587 mi). Apogee: 1,201 km (746 mi). Inclination: 90.00 deg. Period: 106.70 min.

1971 December 11 - 20:47 GMT - Launch Vehicle: Scout. Scout B-1-F S183C Ariel 4 Mass: 100 kg (220 lb). Spacecraft: Ariel. Agency: UK SRC. Perigee: 476 km (295 mi). Apogee: 592 km (367 mi). Inclination: 82.00 deg. Period: 95.30 min. Ionospheric studies. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1972 September 2 - 17:50 GMT - Launch Vehicle: Scout. Scout B-1-F S182C Triad 1 Mass: 94 kg (207 lb). Spacecraft: TIP. Agency: USN. Perigee: 709 km (440 mi). Apogee: 792 km (492 mi). Inclination: 90.00 deg. Period: 99.80 min. Prototype of improved Transit satellite.

1972 November 22 - 00:17 GMT - Launch Vehicle: Scout. Scout D-1-F S185C ESRO 4 Mass: 114 kg (251 lb). Spacecraft: ESRO. Agency: ESRO. Perigee: 245 km (152 mi). Apogee: 1,173 km (728 mi). Inclination: 91.10 deg. Period: 99.00 min. Polar ionosphere investigations. Seventh ESRO satellite. Mass 115 kg. Also registered by the United States as 1972-92A, in A/AC.105/INF.267, with orbital parameters 98.8 min, 244 x 1160 km x 91.1 deg, category B.

1972 December 16 - 11:24 GMT - Launch Vehicle: Scout. Scout D-1-F S181C Aeros 1 Mass: 127 kg (279 lb). Spacecraft: Aeros. Agency: DFVLR. Perigee: 223 km (138 mi). Apogee: 867 km (538 mi). Inclination: 96.90 deg. Period: 95.60 min. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1973 October 30 - 00:37 GMT - Launch Vehicle: Scout. Scout A-1 S178C Transit O-20 Mass: 58 kg (127 lb). Spacecraft: Transit. Agency: USN. Perigee: 885 km (549 mi). Apogee: 1,120 km (690 mi). Inclination: 89.80 deg. Period: 105.20 min. Operational life over 20 years.

1974 March 9 - 02:22 GMT - Launch Vehicle: Scout. Scout D-1-F S188C Miranda Mass: 93 kg (205 lb). Spacecraft: Miranda. Agency: RAE. Perigee: 677 km (420 mi). Apogee: 866 km (538 mi). Inclination: 97.90 deg. Period: 100.30 min. Satellite technology. Miranda was launched at 02:22:11.4 GMT on 1974 Mar 9. Interjection point 13.9N, 126.0E. Anticipated life: longer than 50 years.

1974 June 3 - 23:09 GMT - Launch Vehicle: Scout. Scout E-1 S191C Explorer 52 Mass: 27 kg (59 lb). Spacecraft: Hawkeye. Agency: NASA LaR. Perigee: 469 km (291 mi). Apogee: 125,569 km (78,024 mi). Inclination: 89.00 deg. Period: 3,032.00 min. Solar wind experiments. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1974 July 16 - 11:51 GMT - Launch Vehicle: Scout. Scout D-1-F S186C Aeros 2 Mass: 127 kg (279 lb). Spacecraft: Aeros. Agency: DFVLR. Perigee: 224 km (139 mi). Apogee: 869 km (539 mi). Inclination: 97.50 deg. Period: 95.60 min. Upper atmospheric research. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1974 August 30 - 14:07 GMT - Launch Vehicle: Scout. Scout D-1 S189C FAILURE: Partial Failure. ANS 1 Mass: 129 kg (284 lb). Spacecraft: ANS. Agency: NIVR. Perigee: 258 km (160 mi). Apogee: 1,173 km (728 mi). Inclination: 98.00 deg. Period: 99.10 min. Astronomical Netherlands Satellite; lower than planned orbit.

1975 October 12 - 06:39 GMT - Launch Vehicle: Scout. Scout D-1 S195C Triad 2 Mass: 94 kg (207 lb). Spacecraft: TIP. Agency: USN. Perigee: 427 km (265 mi). Apogee: 490 km (300 mi). Inclination: 90.40 deg. Period: 93.80 min. Prototype of improved Transit satellite. Tested pulsed plasma engine.

1975 December 6 - 03:35 GMT - Launch Vehicle: Scout. Scout F-1 S196C FAILURE: Failure. Explorer (56) Mass: 71 kg (156 lb). Spacecraft: DAD. Agency: NASA. Dual Air Density; air density experiments.

1976 May 22 - 07:42 GMT - Launch Vehicle: Scout. Scout B-1 S179CR P 76-5 Mass: 73 kg (160 lb). Spacecraft: P 76. Agency: USAF STP. Perigee: 981 km (609 mi). Apogee: 1,044 km (648 mi). Inclination: 99.60 deg. Period: 105.40 min. Communications propagation experiments.

1976 September 1 - 21:14 GMT - Launch Vehicle: Scout. Scout D-1 S197C TIP 3 Mass: 94 kg (207 lb). Spacecraft: TIP. Agency: USN. Perigee: 345 km (214 mi). Apogee: 789 km (490 mi). Inclination: 90.30 deg. Period: 95.90 min. Prototype of improved Transit satellite. Also tested pulsed plasma engine.

1977 October 28 - 04:52 GMT - Launch Vehicle: Scout. Scout D-1 S200C Transat O-11 Mass: 94 kg (207 lb). Spacecraft: Transit. Agency: USN. Perigee: 1,059 km (658 mi). Apogee: 1,097 km (681 mi). Inclination: 89.70 deg. Period: 106.80 min. Modification of first APL-built operational Transit for 'related experiments'.

1978 April 26 - 10:20 GMT - Launch Vehicle: Scout. Scout D-1 S201C HCMM Mass: 134 kg (295 lb). Spacecraft: AEM. Agency: NASA GSF. Perigee: 560 km (340 mi). Apogee: 641 km (398 mi). Inclination: 97.60 deg. Period: 96.70 min. Heat Capacity Mapping Mission; prodeuced thermal maps of atmosphere. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).

1979 October 30 - 14:16 GMT - Launch Vehicle: Scout. Scout G-1 S203C Magsat Mass: 181 kg (399 lb). Spacecraft: Magsat. Agency: NASA GSF. Perigee: 352 km (218 mi). Apogee: 561 km (348 mi). Inclination: 96.80 deg. Period: 93.70 min. Measured near-Earth magnetic field and crustal anomalies. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).

1981 May 15 - 06:07 GMT - Launch Vehicle: Scout. Scout G-1 S192C Nova 1 Mass: 170 kg (370 lb). Spacecraft: TIP. Agency: USN. Perigee: 1,165 km (723 mi). Apogee: 1,185 km (736 mi). Inclination: 90.20 deg. Period: 108.90 min. Improved Transit.

1983 June 27 - 15:37 GMT - Launch Vehicle: Scout. Scout D-1 S205C HILAT Spacecraft: Transit. Agency: USAF STP. Perigee: 754 km (468 mi). Apogee: 818 km (508 mi). Inclination: 82.00 deg. Period: 100.60 min. Modification of Transit O-16 for military communications research. Officially: Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).

1984 October 12 - 01:43 GMT - Launch Vehicle: Scout. Scout G-1 S208C Nova 3 Mass: 165 kg (363 lb). Spacecraft: TIP. Agency: USN. Perigee: 1,152 km (715 mi). Apogee: 1,200 km (700 mi). Inclination: 89.90 deg. Period: 108.90 min. Improved Transit. Pulsed plasma engine.

1985 August 3 - 03:31 GMT - Launch Vehicle: Scout. Scout G-1 S209C Transit O-24 Mass: 55 kg (121 lb). Spacecraft: Transit. Agency: USN. Perigee: 1,000 km (600 mi). Apogee: 1,254 km (779 mi). Inclination: 89.90 deg. Period: 107.90 min. First operational Transits launched in 12 years due to reliability of original constellation. First paired Transit launch.

1986 November 14 - 00:23 GMT - Launch Vehicle: Scout. Scout G-1 S199C Polar Bear Mass: 125 kg (275 lb). Spacecraft: Transit. Agency: USAF STP. Perigee: 955 km (593 mi). Apogee: 1,013 km (629 mi). Inclination: 89.60 deg. Period: 104.80 min. Tranist O-17 had been turned over to the National Air and Space Museum in 1976 and was displayed to the public for more than 8 years. In 1984, it was refurbished at APL and launched as the Polar Beacon Experiment and Auroral Research satellite to collect data for studying communications over the Earth’s polar regions.

1987 September 16 - 19:22 GMT - Launch Vehicle: Scout. Scout G-1 S204C Transit O-27 Mass: 59 kg (130 lb). Spacecraft: Transit. Agency: USN. Perigee: 1,016 km (631 mi). Apogee: 1,174 km (729 mi). Inclination: 90.30 deg. Period: 107.20 min. Dual launch of operational Transits manufactured in the 1960's to replenish the constellation.

1988 April 26 - 01:57 GMT - Launch Vehicle: Scout. Scout G-1 S211C Transit O-23 Mass: 64 kg (141 lb). Spacecraft: Transit. Agency: USN. Perigee: 1,016 km (631 mi). Apogee: 1,301 km (808 mi). Inclination: 90.40 deg. Period: 108.50 min. Dual launch of operational Transits manufactured in the 1960's to replenish the constellation.

1988 June 16 - 06:54 GMT - Launch Vehicle: Scout. Scout G-1 S213C Nova 2 Mass: 174 kg (383 lb). Spacecraft: TIP. Agency: USN. Perigee: 1,154 km (717 mi). Apogee: 1,198 km (744 mi). Inclination: 90.10 deg. Period: 108.90 min. Improved Transit. Pulsed plasma thruster

1988 August 25 - 06:59 GMT - Launch Vehicle: Scout. Scout G-1 S214C Transit O-25 Mass: 59 kg (130 lb). Spacecraft: Transit. Agency: USN. Perigee: 1,032 km (641 mi). Apogee: 1,176 km (730 mi). Inclination: 89.80 deg. Period: 107.30 min. Dual launch of operational Transits manufactured in the 1960's to replenish the constellation.

1990 May 9 - 17:50 GMT - Launch Vehicle: Scout. Scout G-1 S212C Macsat 1; M-1 Mass: 68 kg (149 lb). Spacecraft: Macsat. Agency: DARPA. Perigee: 602 km (374 mi). Apogee: 753 km (467 mi). Inclination: 89.90 deg. Period: 98.30 min. Multiple Access Communications Satellite; global store and forward communications. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1991 June 29 - 14:00 GMT - Launch Vehicle: Scout. Scout G-1 S216C REX Mass: 85 kg (187 lb). Spacecraft: REX. Agency: USAF Rom. Perigee: 767 km (476 mi). Apogee: 869 km (539 mi). Inclination: 89.50 deg. Period: 101.30 min. Radiation Experiment; tested communications components in high radiation environment. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1992 July 3 - 14:19 GMT - Launch Vehicle: Scout. Scout G-1 S215C SAMPEX Mass: 158 kg (348 lb). Spacecraft: SAMPEX. Agency: NASA GSF. Perigee: 506 km (314 mi). Apogee: 670 km (410 mi). Inclination: 81.70 deg. Period: 96.50 min. First Small Explorer mission; Solar Anomalous and Magnetospheric Particle Explorer. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1992 November 21 - 13:45 GMT - Launch Vehicle: Scout. Scout G-1 S210C MSTI Mass: 180 kg (390 lb). Spacecraft: MSTI. Agency: USAF/SDI. Perigee: 289 km (179 mi). Apogee: 366 km (227 mi). Inclination: 96.70 deg. Period: 91.10 min. BMDO technology demonstration; Miniature Seeker Technology Demonstration. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

1993 June 25 - 23:30 GMT - Launch Vehicle: Scout. Scout G-1 S217C Radcal Mass: 95 kg (209 lb). Spacecraft: Radcal. Agency: USAF 30S. Perigee: 753 km (467 mi). Apogee: 882 km (548 mi). Inclination: 89.60 deg. Period: 101.20 min. Radar calibration. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).