Encyclopedia Astronautica
April 18


April 18 Chronology


1907 April 18 - .
  • Birth of Werner Kuers - . Nation: Germany; USA. Summary: German engineer in WW2, member of the Rocket Team in the United States thereafter..

1951 April 18 - . 18:39 GMT - . Launch Site: Holloman. Launch Complex: Holloman A. LV Family: Aerobee. Launch Vehicle: Aerobee RTV-A-1. LV Configuration: Aerobee RTV-A-1 USAF 12.
  • Aeromed 1 Biological mission - . Nation: USA. Agency: USAF AFSC. Apogee: 61 km (37 mi). Summary: Biological research. Launched at 1139 local time. Reached 61.2 km. The first Aerobee research rocket containing a biomedical experiment (monkey - name unknown)..

1953 April 18 - .
  • Reorganization of Soviet missile bureaucracy. - . Nation: USSR. Summary: Ministry of Armed Forces Decree 'On formation of UZKA of GAU' was issued..

1953 April 18 - . Launch Site: Kapustin Yar. LV Family: R-11. Launch Vehicle: R-11.
  • - . Nation: USSR. Agency: Korolev. Apogee: 150 km (90 mi). Massive problems were encountered in the difficult test series - with poor-quality kerosene fuel, handling and leakage of the propellants, and reliable start of the engine. But the Red Army saw much more promise in the design than in Korolev's cumbersome liquid oxygen rockets.

1953 April 18 - . Launch Site: Hammaguira. Launch Complex: Hammaguira Bechar. LV Family: Veronique. Launch Vehicle: Veronique. LV Configuration: Veronique N11. FAILURE: Failure.
  • Test mission - . Nation: France. Agency: LRBA. Apogee: 0 km ( mi).

1958 April 18 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC25A. LV Family: Polaris. Launch Vehicle: Polaris TV. LV Configuration: Polaris TV 1-204-11.
  • Test mission - . Nation: USA. Agency: USN. Apogee: 500 km (310 mi).

1960 April 18 - . LV Family: T-7. Launch Vehicle: T-7.
  • T-7 motor test - . Nation: China. Related Persons: Tsien. Summary: Tsien reviewed rocket development in Shanghai and views a T-7 motor test..

1960 April 18 - . 23:09 GMT - . Launch Site: Wallops Island. Launch Complex: Wallops Island LA3. LV Family: Scout. Launch Vehicle: Scout X. LV Configuration: Scout X SX-1. FAILURE: Vehicle broke up after first-stage burnout.. Failed Stage: 1.
  • Cub Scout test - . Nation: USA. Agency: NASA. Apogee: 48 km (29 mi). Summary: Scout test vehicle, with live first and third stages. Suborbital..

1961 April 18 - . 04:40 GMT - . Launch Site: White Sands. Launch Complex: White Sands LC35. LV Family: Aerobee. Launch Vehicle: Aerobee 150. LV Configuration: Aerobee 150 NB3.104.
  • NRL NB3.104 Ultraviolet astronomy mission - . Nation: USA. Agency: NRL. Apogee: 242 km (150 mi).

1961 April 18 - . 12:27 GMT - . Launch Site: Akita. LV Family: Kappa. Launch Vehicle: Kappa 8. LV Configuration: Kappa 8 K-8-6.
  • Ionosphere mission - . Nation: Japan. Agency: ISAS. Apogee: 150 km (90 mi).

1962 April 18 - . Launch Site: Lowry AFB. LV Family: Titan. Launch Vehicle: Titan 1.
  • Titan I ICBM 848th SMS (nine missiles) declared operational at Lowry AFB - . Nation: USA.

1962 April 18 - . 00:54 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1E. LV Family: Delta. Launch Vehicle: Thor Agena B. LV Configuration: Thor Agena B 331 / Agena B 1124.
  • Discoverer 39 - . Payload: KH-4 s/n 9032 / Agena B 1124. Mass: 1,150 kg (2,530 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-4. Decay Date: 1962-05-28 . USAF Sat Cat: 276 . COSPAR: 1962-Lambda-1. Apogee: 540 km (330 mi). Perigee: 158 km (98 mi). Inclination: 73.5000 deg. Period: 91.60 min. Summary: KH-4. Best mission to date..

1962 April 18 - . 18:17 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC26A. LV Family: Jupiter. Launch Vehicle: Jupiter. LV Configuration: Jupiter IRBM CM-114.
  • CTL - . Nation: Turkey. Agency: TUAF. Apogee: 500 km (310 mi). Combat Training Launch fired from AMR at 1317 hours and 54.1 seconds EST to a predicted impact point of 1,514 nm from the firing site. All functions of the flight were normal up to 153 seconds, at which time fuel depletion was reached and normal guidance cut-off was not achieved. The missile impacted approximately 230 miles short of the intended target. All missions assigned to the NATO training launch crew were accomplished.

1963 April 18 - . Launch Site: ETR Launch Area. Launch Platform: SSBN 608. LV Family: Polaris. Launch Vehicle: Polaris A2.
  • Operational test - . Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).

1963 April 18 - . Launch Site: ETR Launch Area. Launch Platform: SSBN 608. LV Family: Polaris. Launch Vehicle: Polaris A2.
  • Operational test - . Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).

1963 April 18 - . Launch Site: ETR Launch Area. Launch Platform: SSBN 608. LV Family: Polaris. Launch Vehicle: Polaris A2.
  • Operational test - . Nation: USA. Agency: USN. Apogee: 1,000 km (600 mi).

1963 April 18 - . Launch Site: White Sands. Launch Complex: White Sands LC38. LV Family: Nike Zeus. Launch Vehicle: Nike Zeus. LV Configuration: Nike Zeus-3.
  • Test mission - . Nation: USA. Agency: USA. Apogee: 200 km (120 mi).

1963 April 18 - . 20:16 GMT - . Launch Site: Hidden Hills DZ. Launch Pad: 36.1 N x 116.0 W. Launch Platform: NB-52 008. LV Family: X-15. Launch Vehicle: X-15. LV Configuration: X-15 3-15-25. FAILURE: Nose gear scoop door opens at Mach 3.4..
  • X-15A HT,Local flow,IR Test/Technology mission - . Nation: USA. Agency: NASA; USAF. Apogee: 28 km (17 mi). Summary: Nose landing gear failed. Maximum Speed - 6066 kph. Maximum Altitude - 28190 m..

1963 April 18 - . 21:00 GMT - . Launch Site: Wallops Island. LV Family: Aerobee. Launch Vehicle: Aerobee 300A. LV Configuration: Aerobee 300A NASA 06.07GA.
  • Thermo Probe 2(AE-A) Aeronomy mission - . Nation: USA. Agency: NASA. Apogee: 342 km (212 mi).

1964 April 18 - . 00:38 GMT - . Launch Site: Fort Churchill. LV Family: Cajun. Launch Vehicle: Nike Cajun. LV Configuration: Nike Cajun NASA 10.73GA.
  • Grenades Aeronomy mission - . Nation: USA. Agency: NASA. Apogee: 119 km (73 mi).

1964 April 18 - . 00:59 GMT - . Launch Site: Wallops Island. LV Family: Cajun. Launch Vehicle: Nike Cajun. LV Configuration: Nike Cajun NASA 10.83GA.
  • Grenades Aeronomy mission - . Nation: USA. Agency: NASA. Apogee: 119 km (73 mi).

1965 April 18 - . LV Family: Titan. Launch Vehicle: Titan 1.
  • By this date all Titan I missiles had been shipped to storage at Mira Loma Air Force Station, Riverside County, California. - . Nation: USA.

1966 April 18 - .
  • Apollo spacecraft 007 and 011 delivered - . Nation: USA. Program: Apollo. Spacecraft: Apollo CSM; CSM Block I. Spacecraft 007 and 011 were delivered to NASA by North American Aviation. Spacecraft 007 was delivered to Houston to be used for water impact and flotation tests in the Gulf of Mexico and in an environmental tank at Ellington AFB. It contained all recovery systems required during actual flight and the total configuration was that of a flight CM.

    The CM of spacecraft 011 was similar to those in which astronauts would ride in later flights and the SM contained support systems including environmental control and fuel cell systems and the main service propulsion system. Spacecraft 011 was scheduled to be launched during the third quarter of 1966.


1966 April 18 - .
  • Lunar Worm Planetary Roving Vehicle - . Nation: USA. Related Persons: Shea. Program: Apollo. Spacecraft: Lunar Worm. ASPO Manager Joseph F. Shea and members of his organization were invited to attend the formal presentation by the Aeronutronic Division of Philco Corp. on a "Study of Lunar Worm Planetary Roving Vehicle Concept," at LaRC on May 3. The exploratory study to determine the feasibility of a bellows-concept mobile vehicle included a mobility and traction analysis for several kinds of bellows motion and several soil surfaces; analysis of both metallic and nonmetallic construction to provide the bellows structure; brief design studies of the concept as applied to a small unmanned vehicle, a supply vehicle, a small lunar shelter, a large lunar shelter; and an overall evaluation of the suitability of the concept for carrying out various missions as compared with other vehicles.

1966 April 18 - . LV Family: Titan. Launch Vehicle: Titan 2.
  • Stage I of Gemini launch vehicle 11 was erected in the west cell of the vertical test facility at Martin-Baltimore. - . Nation: USA. Flight: Gemini 11. Summary: After completing horizontal tests April 25, stage II was erected April 29. Power was applied to the vehicle for the first time on May 9, and Subsystems Functional Verification Tests were completed June 8..

1966 April 18 - . Launch Site: Baikonur. Launch Complex: Baikonur LC41/4. LV Family: R-16. Launch Vehicle: R-16U.
  • Military training launch - . Nation: USSR. Agency: RVSN. Apogee: 1,210 km (750 mi).

1967 April 18 - . 09:20 GMT - . Launch Site: Eglin. LV Family: Nike. Launch Vehicle: Nike Iroquois. LV Configuration: Nike Iroquois CRL AF07.384.
  • Mass spectrometer Ionosphere mission - . Nation: USA. Agency: AFCRL. Apogee: 135 km (83 mi).

1967 April 18 - . 10:21 GMT - . Launch Site: Eglin. LV Family: Nike. Launch Vehicle: Nike Iroquois. LV Configuration: Nike Iroquois CRL AF07.386.
  • Mass spectrometer Aeronomy mission - . Nation: USA. Agency: AFCRL. Apogee: 138 km (85 mi).

1967 April 18 - . 11:40 GMT - . Launch Site: Eglin. LV Family: Nike. Launch Vehicle: Nike Iroquois. LV Configuration: Nike Iroquois CRL AF07.560.
  • Sphere / Ion trap Aeronomy mission - . Nation: USA. Agency: AFCRL. Apogee: 169 km (105 mi).

1967 April 18 - . 20:08 GMT - . Launch Site: Point Barrow. LV Family: Cajun. Launch Vehicle: Nike Cajun. LV Configuration: Nike Cajun NASA 10.228GM.
  • Grenade Aeronomy mission - . Nation: USA. Agency: NASA. Apogee: 120 km (70 mi).

1968 April 18 - .
  • Two men are killed working on the N1. - . Nation: USSR. Program: Lunar L3.

1968 April 18 - . Launch Site: Vandenberg. Launch Complex: Vandenberg 576A1. LV Family: Atlas. Launch Vehicle: Atlas E. LV Configuration: Atlas E 77E.
  • ABRES RVTO-1A-1 re-entry vehicle test flight - . Nation: USA. Agency: USAF AFSC. Apogee: 1,600 km (900 mi).

1968 April 18 - . Launch Site: Baikonur. Launch Complex: Baikonur PU33. LV Family: Tsiklon. Launch Vehicle: R-36 8K67.
  • 8F765 warhead state trials flight - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1968 April 18 - . 05:42 GMT - . Launch Site: Fort Churchill. LV Family: Black Brant. Launch Vehicle: Black Brant 2. LV Configuration: Black Brant II AKD-2A-110.
  • Auroral breakup Aurora / aeronomy / ionosphere mission - . Nation: Canada. Agency: NRCC. Apogee: 152 km (94 mi).

1968 April 18 - . 06:14 GMT - . Launch Site: Fort Churchill. LV Family: Black Brant. Launch Vehicle: Black Brant 2. LV Configuration: Black Brant II AKD-2A-112.
  • Auroral breakup Aurora / aeronomy / ionosphere mission - . Nation: Canada. Agency: NRCC. Apogee: 155 km (96 mi).

1968 April 18 - . 10:30 GMT - . Launch Site: Plesetsk. LV Family: R-7. Launch Vehicle: Voskhod 11A57.
  • Cosmos 214 - . Mass: 6,300 kg (13,800 lb). Nation: USSR. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1968-04-26 . USAF Sat Cat: 3203 . COSPAR: 1968-032A. Apogee: 373 km (231 mi). Perigee: 200 km (120 mi). Inclination: 81.4000 deg. Period: 90.30 min. Summary: High resolution photo reconnaissance satellite; returned film capsule.

1968 April 18 - . 22:29 GMT - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar LC86/4. LV Family: Kosmos 2. Launch Vehicle: Kosmos 11K63.
  • Cosmos 215 - . Payload: DS-U1-A s/n 1. Mass: 385 kg (848 lb). Nation: USSR. Agency: MO. Program: DS. Class: Earth. Type: Ionosphere satellite. Spacecraft: DS-U1-A. Completed Operations Date: 1968-06-06 . Decay Date: 1968-06-30 . USAF Sat Cat: 3205 . COSPAR: 1968-033A. Apogee: 403 km (250 mi). Perigee: 255 km (158 mi). Inclination: 48.4000 deg. Period: 91.00 min. Summary: Studied the optical characteristics of the atmosphere. Radiation observatory; eight telescopes..

1969 April 18 - .
  • Changes in launch readiness dates for Apollo 12 and Apollo 13 missions - . Nation: USA. Program: Apollo. Flight: Apollo 12; Apollo 13. Summary: ASPO announced changes in launch readiness dates for the Apollo 12 and Apollo 13 missions. Apollo 12 was moved up from September 18 to September 13, 1969; and Apollo 13 was moved up from December 1 to November 10..

1969 April 18 - .
  • Titov in trouble - . Nation: USSR. Related Persons: Titov. Summary: There is an incident between Titov and a movie crew. This is the first such altercation he has had in three years but is still very serious..

1969 April 18 - . Launch Site: Vandenberg. Launch Complex: Vandenberg LF25. LV Family: Minuteman. Launch Vehicle: Minuteman 2. LV Configuration: Minuteman 2 2287.
  • ST 3 - . Nation: USA. Agency: USAF AFSC. Apogee: 1,300 km (800 mi).

1969 April 18 - . Launch Site: Baikonur. Launch Complex: Baikonur LC161/35. LV Family: Tsiklon. Launch Vehicle: R-36 8K67.
  • State trials missile test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1969 April 18 - . 05:47 GMT - . Launch Site: Fort Churchill. LV Family: Tomahawk Sandia. Launch Vehicle: Nike Tomahawk. LV Configuration: Nike Tomahawk CRL AT08.288.
  • Magnetic field Plasma mission - . Nation: USA. Agency: USAF. Apogee: 296 km (183 mi).

1969 April 18 - . 05:48 GMT - . Launch Site: Fort Churchill. LV Family: Nike. Launch Vehicle: Nike Iroquois. LV Configuration: Nike Iroquois CRL AH07.297.
  • Magnetic field Plasma mission - . Nation: USA. Agency: USAF. Apogee: 160 km (90 mi).

1969 April 18 - . 13:00 GMT - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar V-2. LV Family: MR-12. Launch Vehicle: MR-12.
  • Ionosphere mission - . Nation: USSR. Agency: AN. Apogee: 174 km (108 mi).

1969 April 18 - . 15:20 GMT - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar V-2. LV Family: MR-12. Launch Vehicle: MR-12.
  • Solar Extreme ultraviolet mission - . Nation: USSR. Agency: AN. Apogee: 178 km (110 mi).

1970 April 18 - . LV Family: N1; Saturn V.
  • Kamanin considers the Apollo 13 mission. - . Nation: USSR. Program: Lunar L3; Apollo. Flight: Apollo 13. He believes it was a 'true test' of American technical capability in space. The saving of the American astronauts demonstrated the robust redundancy in the American Saturn V - Apollo design, as compared with the Soviet N1-L3. The latter, Kamanin remarks, is a bad launch vehicle, boosting a bad spacecraft. Kamanin sees the Soviet science fiction film Solaris - and finds it too fantastic for his taste.

1971 April 18 - .
  • More brass arrive at Baikonur to view the launch of Salyut 1. - . Nation: USSR. Program: Salyut. Spacecraft: Salyut 1. Summary: All is on schedule at Area 81..

1972 April 18 - . 01:30 GMT - . Launch Site: Kwajalein. Launch Vehicle: Rocketsonde.
  • Starute,Datasonde - . Nation: USA. Agency: MRN. Apogee: 60 km (37 mi).

1973 April 18 - . 04:25 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg LF02. LV Family: Minuteman. Launch Vehicle: Minuteman 2.
  • FOT GT112M Follow-on Test launch - . Nation: USA. Agency: USAF SAC. Apogee: 1,300 km (800 mi).

1974 April 18 - . 08:40 GMT - . Launch Site: Poker Flat. LV Family: Tomahawk Sandia. Launch Vehicle: Paiute Tomahawk. LV Configuration: Paiute Tomahawk CRL A10.312-3.
  • ICECAP 74B Echo 3? Plasma mission - . Nation: USA. Agency: USAF CRL. Apogee: 185 km (114 mi).

1975 April 18 - .
  • X-24 Flight 49 - . Crew: Manke. Payload: X-24B flight 21. Nation: USA. Related Persons: Manke. Class: Manned. Type: Manned spaceplane. Spacecraft: X-24B. Summary: Maximum Speed - 1279 kph. Maximum Altitude - 17650 m. Flight Time - 450 sec..

1975 April 18 - . Launch Site: ETR Launch Area. Launch Platform: SSBN 645. Launch Vehicle: Poseidon.
  • FOT-9 Follow-on operational missile test - . Nation: USA. Agency: USN. Apogee: 500 km (310 mi).

1975 April 18 - . Launch Site: ETR Launch Area. Launch Platform: SSBN 645. Launch Vehicle: Poseidon.
  • FOT-9 Follow-on operational missile test - . Nation: USA. Agency: USN. Apogee: 500 km (310 mi).

1975 April 18 - . Launch Site: Tonopah. LV Family: Nike. Launch Vehicle: Nike. FAILURE: Failure.
  • Test mission - . Nation: USA. Agency: Sandia. Apogee: 0 km ( mi).

1975 April 18 - . 10:00 GMT - . Launch Site: Plesetsk. LV Family: R-7. Launch Vehicle: Voskhod 11A57.
  • Cosmos 728 - . Mass: 6,000 kg (13,200 lb). Nation: USSR. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: Zenit-2M. Duration: 11.00 days. Decay Date: 1975-04-29 . USAF Sat Cat: 7745 . COSPAR: 1975-031A. Apogee: 311 km (193 mi). Perigee: 209 km (129 mi). Inclination: 72.8000 deg. Period: 89.70 min. Summary: Area survey photo reconnaissance satellite; returned film capsule; separated science capsule..
  • Nauka Cosmos 728 - . Payload: Nauka. Nation: USSR. Agency: MOM. Spacecraft: Nauka. Decay Date: 1975-05-16 . USAF Sat Cat: 7779 . COSPAR: 1975-031G. Apogee: 313 km (194 mi). Perigee: 199 km (123 mi). Inclination: 72.8000 deg. Period: 89.63 min.

1975 April 18 - . 16:48 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC4W. LV Family: Titan. Launch Vehicle: Titan 24B. LV Configuration: Titan 24B 24B-14 (3B-48).
  • OPS 4883 - . Payload: KH-8 no. 44 / Agena D. Mass: 3,000 kg (6,600 lb). Nation: USA. Agency: NRO; USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-8. Decay Date: 1975-06-05 . USAF Sat Cat: 7747 . COSPAR: 1975-032A. Apogee: 398 km (247 mi). Perigee: 133 km (82 mi). Inclination: 110.5000 deg. Period: 89.80 min. Summary: KH-8 type satellite. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .

1976 April 18 - . 23:55 GMT - . Launch Site: Thumba. LV Family: Belier. Launch Vehicle: Centaure 2B. LV Configuration: Centaure 2B ISRO 5.32.
  • ISRO 5.32 Aeronomy / ionosphere mission - . Nation: India. Agency: ISRO. Apogee: 152 km (94 mi).

1977 April 18 - . 17:00 GMT - . Launch Site: Antigua. Launch Vehicle: Rocketsonde.
  • - . Nation: USA. Agency: MRN. Apogee: 73 km (45 mi).

1978 April 18 - . Launch Site: Thumba. LV Family: RH. Launch Vehicle: RH.
  • AST 1 Technology mission - . Nation: India. Agency: ISRO. Apogee: 130 km (80 mi).

1979 April 18 - .
  • Complete left-hand OMS/RCS Phase I qualification - . Nation: USA. Program: STS. Class: Manned. Type: Manned spaceplane. Spacecraft: Enterprise. Summary: Complete left-hand OMS/RCS Phase I qualification, WSTF May 1 Enterprise (OV-101)/ ET/SRBs mated on mobile launcher platform,.

1979 April 18 - . 09:09 GMT - . Launch Site: Poker Flat. LV Family: Terrier. Launch Vehicle: Terrier Malemute. LV Configuration: Terrier Malemute NASA 29.12GE.
  • Plasma mission - . Nation: USA. Agency: NASA. Apogee: 500 km (310 mi).

1979 April 18 - . 09:15 GMT - . Launch Site: Poker Flat. LV Family: Tomahawk Sandia. Launch Vehicle: Nike Tomahawk. LV Configuration: Nike Tomahawk NASA 18.217GE.
  • Plasma mission - . Nation: USA. Agency: NASA. Apogee: 270 km (160 mi).

1979 April 18 - . 12:00 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC90/19. Launch Pad: LC90/pad?. LV Family: Tsiklon. Launch Vehicle: Tsiklon-2.
  • Cosmos 1094 - . Mass: 3,000 kg (6,600 lb). Nation: USSR. Agency: MO. Program: EORSAT. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: US-P. Decay Date: 1979-09-30 . USAF Sat Cat: 11333 . COSPAR: 1979-033A. Apogee: 442 km (274 mi). Perigee: 426 km (264 mi). Inclination: 65.0000 deg. Period: 93.30 min. Summary: Ocean monitoring..

1980 April 18 - . 00:51 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC90/19. Launch Pad: LC90/pad?. LV Family: Tsiklon. Launch Vehicle: Tsiklon-2.
  • Cosmos 1174 - . Mass: 1,400 kg (3,000 lb). Nation: USSR. Agency: MO. Class: Military. Type: Anti-satellite system. Spacecraft: IS-A. Decay Date: 1980-04-20 . USAF Sat Cat: 11765 . COSPAR: 1980-030A. Apogee: 1,419 km (881 mi). Perigee: 372 km (231 mi). Inclination: 66.1000 deg. Period: 102.90 min. ASAT interceptor. First test of ASAT after extended storage. Missed Cosmos 1171 target by a large distance; over the two following days two more attempts were made with the backup engine, but all failed. On 20 April the satellite was ordered to self-destruct in orbit, ending the longest ASAT interceptor mission.

1980 April 18 - . 17:31 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC41/1. LV Family: R-7. Launch Vehicle: Molniya 8K78M. FAILURE: Fourth stage failure.. Failed Stage: 3.
  • Cosmos 1175 - . Payload: Molniya-3 s/n 26. Mass: 1,600 kg (3,500 lb). Nation: USSR. Agency: MOM. Program: Molniya. Class: Communications. Type: Military communications satellite. Spacecraft: Molniya-3. Decay Date: 1980-09-29 . USAF Sat Cat: 11769 . COSPAR: 1980-031C. Apogee: 458 km (284 mi). Perigee: 251 km (155 mi). Inclination: 62.8000 deg. Period: 91.60 min. Summary: Probable failed early warning. Investigation of the upper atmosphere and outer space..

1981 April 18 - . Launch Site: Baikonur. Launch Complex: Baikonur LC172. LV Family: MR-UR-100. Launch Vehicle: MR-UR-100U 15A16.
  • Operational test - . Nation: USSR. Agency: RVSN. Apogee: 1,000 km (600 mi).

1983 April 18 - . 21:59 GMT - . Launch Site: Eareckson. Launch Vehicle: Rocketsonde.
  • Arcasonde - . Nation: USA. Agency: MRN. Apogee: 45 km (27 mi).

1984 April 18 - . 12:49 GMT - . Launch Site: Ascension. Launch Vehicle: Rocketsonde.
  • Arcasonde - . Nation: USA. Agency: MRN. Apogee: 60 km (37 mi).

1985 April 18 - . 21:40 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC90/19. Launch Pad: LC90/pad?. LV Family: Tsiklon. Launch Vehicle: Tsiklon-2.
  • Cosmos 1646 - . Mass: 3,000 kg (6,600 lb). Nation: USSR. Agency: MO. Program: EORSAT. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: US-P. Decay Date: 1987-11-30 . USAF Sat Cat: 15653 . COSPAR: 1985-030A. Apogee: 399 km (247 mi). Perigee: 378 km (234 mi). Inclination: 65.0000 deg. Period: 92.30 min. Summary: Ocean monitoring..

1986 April 18 - . 15:35 GMT - . Launch Site: White Sands. LV Family: Hawk. Launch Vehicle: Nike Orion. LV Configuration: Nike Orion NASA 31.59UU.
  • CWAS 13 Aeronomy mission - . Nation: USA. Agency: NASA. Apogee: 140 km (80 mi).

1986 April 18 - . 17:45 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC4E. LV Family: Titan. Launch Vehicle: Titan 34D. LV Configuration: Titan 34D 34D-9 (04D-2). FAILURE: SRM case insulation burned through, causing case burn-through and catastrophic explosion over pad at T+8.5 seconds.. Failed Stage: 0.
  • KH-9 no. 20 - . Mass: 13,300 kg (29,300 lb). Nation: USA. Agency: USAF. Class: Surveillance. Type: Military surveillance satellite. Spacecraft: KH-9. Decay Date: 1986-04-18 . COSPAR: F860418A. Summary: KH-9 type satellite..
  • SRV-1 - . Payload: SRV-1. Mass: 11,400 kg (25,100 lb). Nation: USA. Agency: USAF AFSC. Spacecraft: KH-9. COSPAR: F860418F.
  • SRV-2 - . Payload: SRV-2. Mass: 11,400 kg (25,100 lb). Nation: USA. Agency: USAF AFSC. Spacecraft: KH-9. COSPAR: F860418C.
  • SRV-3 - . Payload: SRV-3. Mass: 11,400 kg (25,100 lb). Nation: USA. Agency: USAF AFSC. Spacecraft: KH-9. COSPAR: F860418D.
  • SSF-D No. 6 - . Payload: SSF-D No. 6. Mass: 60 kg (132 lb). Nation: USA. Agency: USAF. Class: Military. Type: Military naval signals reconnaisance satellite. Spacecraft: SSF. Decay Date: 1986-04-18 . COSPAR: F860418B.
  • SRV-4 - . Payload: SRV-4. Mass: 11,400 kg (25,100 lb). Nation: USA. Agency: USAF AFSC. Spacecraft: KH-9. COSPAR: F860418E.

1986 April 18 - . 19:50 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC41/1. LV Family: R-7. Launch Vehicle: Molniya 8K78M. LV Configuration: Molniya 8K78M-ML.
  • Molniya 3-28 - . Payload: Molniya-3 s/n 43. Mass: 1,600 kg (3,500 lb). Nation: USSR. Agency: MOM. Program: Molniya. Class: Communications. Type: Military communications satellite. Spacecraft: Molniya-3. Decay Date: 1999-02-25 . USAF Sat Cat: 16683 . COSPAR: 1986-031A. Apogee: 39,095 km (24,292 mi). Perigee: 1,255 km (779 mi). Inclination: 64.7000 deg. Period: 717.70 min. Replaced Molniya 3-23. Operation of the long-range telephone and telegraph radio communications system in the USSR; transmission of USSR Central Television programmes to stations in the Orbita network and within the framework of international cooperation.

1987 April 18 - . 03:00 GMT - . Launch Site: ETR Launch Area. Launch Platform: UK S23. LV Family: Polaris. Launch Vehicle: Polaris A3. LV Configuration: Polaris A3TK.
  • Chevaline demonstration and shakedown operations launch - . Nation: UK. Agency: RN. Apogee: 1,000 km (600 mi).

1988 April 18 - . 13:12 GMT - . Launch Site: Sea-launched. Launch Pad: UNKO. Launch Platform: PRILIV. Launch Vehicle: MMR-06.
  • Aeronomy mission - . Nation: USSR. Agency: GMS. Apogee: 60 km (37 mi).

1990 April 18 - . 02:00 GMT - . Launch Site: Ryori. LV Family: MT-135. Launch Vehicle: MT-135P. LV Configuration: MT-135P-R743.
  • Meteorological mission - . Nation: Japan. Agency: JMA. Apogee: 60 km (37 mi).

1991 April 18 - . Launch Site: Vandenberg.
  • Second and final launch of the Small ICBM missile - . Nation: USA. Summary: Second and final launch of the Small ICBM missile (first launch on 11 May 1989)..

1991 April 18 - . 18:33 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg TP-01. Launch Vehicle: SICBM. LV Configuration: SICBM FTM-2A.
  • Test mission - . Nation: USA. Agency: AFSC. Apogee: 1,000 km (600 mi).

1991 April 18 - . 23:30 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC36B. LV Family: Atlas. Launch Vehicle: Atlas I. LV Configuration: Atlas I AC-70. FAILURE: RL-10 Centaur engine turbopump failed at T+361 seconds; destroyed by range safety.. Failed Stage: 2.
  • Yuri 3H - . Payload: BS-3H. Mass: 600 kg (1,320 lb). Nation: Japan. Agency: TSCJ. Manufacturer: Lockheed. Program: BS. Class: Communications. Type: Civilian communications satellite. Spacecraft: AS 3000. Decay Date: 1991-04-18 . COSPAR: F910418A. Apogee: 175 km (108 mi).

1994 April 18 - . 04:30 GMT - . Launch Site: White Sands. Launch Complex: White Sands LC36. LV Family: Black Brant. Launch Vehicle: Black Brant 9. LV Configuration: Black Brant IX NASA 36.109UG.
  • JHU FOT 11R Ultraviolet astronomy mission - . Nation: USA. Agency: NASA. Apogee: 300 km (180 mi).

1995 April 18 - . 18:00 GMT - . Launch Site: White Sands. Launch Complex: White Sands LC36. LV Family: Black Brant. Launch Vehicle: Black Brant 9. LV Configuration: Black Brant IX NASA 36.108DS.
  • Solar mission - . Nation: USA. Agency: NASA. Apogee: 247 km (153 mi).

1998 April 18 - . 04:00 GMT - . Launch Site: White Sands. LV Family: Black Brant. Launch Vehicle: Black Brant 9. LV Configuration: Black Brant IX NASA 36.177UG.
  • SCARI 2 Ultraviolet astronomy mission - . Nation: USA. Agency: NASA Greenbelt. Apogee: 300 km (180 mi).

1998 April 18 - . 07:30 GMT - . Launch Site: White Sands. LV Family: Black Brant. Launch Vehicle: Black Brant 9. LV Configuration: Black Brant IX NASA 36.160UG.
  • Ultraviolet astronomy mission - . Nation: USA. Agency: NASA Greenbelt. Apogee: 300 km (180 mi).

2001 April 18 - .
  • Death of Edward V Stearns - . Nation: USA. Related Persons: Stearns. Summary: American physicist, with Rand 1949-1954; assistant Chief Engineer, Lockheed Missile and Space, after 1954..

2001 April 18 - . 10:13 GMT - . Launch Site: Sriharikota. Launch Complex: Sriharikota PSLV. Launch Vehicle: GSLV. LV Configuration: GSLV-D1.
  • GSAT-1 - . Payload: GramSat. Mass: 1,530 kg (3,370 lb). Nation: India. Agency: ISRO. Program: Insat. Class: Communications. Type: Civilian communications satellite. Spacecraft: Gsat. USAF Sat Cat: 26745 . COSPAR: 2001-015A. Apogee: 35,814 km (22,253 mi). Perigee: 33,825 km (21,017 mi). Inclination: 0.0000 deg. Period: 1,387.00 min. Experimental Rural Communications satellite. Launch delayed following pad abort on March 28. First launch of the Indian GSLV launch vehicle. GSat 1 was an Indian, 1500 kg scaled-dow) test model of a future geosynchronous communications spacecraft with a 440 N ISRO liquid apogee motor, and S-band and C-band ommunications transponders, similar to the Insat-2 satellites. The motor for the cryogenic, hydrogen-oxygen upper stage had been purchased from Russia but the design had never flown in space before. The stage cut off without providing the required delta-V - preliminary analysis revealed a shortfall of 0.5% in the thrust. An attempt was made to reach a usable orbit using the station-keeping motor of the GSAT satellite itself. After a series of burns, GSat 1 ran out of propellant - 10 kg more fuel would have been required to reach a stationary orbit. In the end, the parameters of the drifting (about 13 deg/day) orbit were period 23 hours, apogee 35,665 km, perigee 33,806 km, and inclination 0.99 deg. The fully functional transponders and transmitters on board were deactivated on instructions of the International Telecommunications Union. As of 4 September 2001 located at 54.88 deg E drifting at 13.212 deg E per day. As of 2007 Mar 10 located at 50.16W drifting at 12.778E degrees per day.

2002 April 18 - .
  • Stardust At Aphelion (2.72 AU) - . Nation: USA. Spacecraft: Stardust.

2003 April 18 - . Launch Site: Mojave. Launch Vehicle: Tier One.
  • Tier One roll out / White Knight Flight 21 - . Nation: USA. Related Persons: Binnie; Melvill. Program: X-Prize. Spacecraft: SpaceShipOne. Scaled Composites (Mojave, California, USA) rolls out their X-Prize vehicle, consisting of the White Knight carrier aircraft and SpaceShipOne spaceplane. This is followed by a demonstration flight by the White Knight carrier-launch aircraft. Flight Time: 0.2 hours Pilot: Melvill Copilot: Binnie. Objectives: Formal media rollout Results: Good show for the VIP/media audience

2003 April 18 - .
  • Stardust Exits Solar Conjunction - . Nation: USA. Spacecraft: Stardust.

2004 April 18 - . 15:59 GMT - . Launch Site: Xichang. Launch Complex: Xichang LC1. Launch Pad: LC1?. LV Family: CZ. Launch Vehicle: CZ-2C. LV Configuration: Chang Zheng 2C CZ2C-23 (76).
  • Tansuo 1 - . Payload: Shiyan 1. Mass: 204 kg (449 lb). Nation: China. Agency: Harbin. Class: Technology. Type: Navigation technology satellite. Spacecraft: Shiyan. USAF Sat Cat: 28220 . COSPAR: 2004-012A. Apogee: 616 km (382 mi). Perigee: 598 km (371 mi). Inclination: 97.7000 deg. Period: 96.80 min. China's first transmission-type small satellite capable of stereo mapping. It was jointly designed by the Harbin Polytechnic University, Chinese Research Institute of Space Technology, Changchun Photomechanical Institute of the Chinese Academy of Sciences (CAS)and Xi'an Surveys and Designs Institute. The experiment satellite carried out photographic surveys of China's land resources, monitored the geographical environment and conducted scientific research on mapping. It was handed over for use to the Satellite Remote-Sensing Ground Station of CAS following the on-orbit testing.
  • Naxing 1 - . Mass: 25 kg (55 lb). Nation: China. Agency: Tsinghua. Class: Surveillance. Type: Military surveillance radar satellite. Spacecraft: OlympicSat. USAF Sat Cat: 28221 . COSPAR: 2004-012B. Apogee: 616 km (382 mi). Perigee: 599 km (372 mi). Inclination: 97.7000 deg. Period: 96.80 min. Summary: Naxing 1 (a contraction of Nami Weixing 'Nanosatellite') was designed for high-tech experiments. The satellite was developed and will be used by the elite Qinghua University and the Aerospace Qinghua Satellite Technologies Co. Ltd..
  • Unannounced Chinese satellite? - . Nation: China. Agency: PLA. Class: Surveillance. Type: Military surveillance radar satellite. Decay Date: 2004-08-21 . USAF Sat Cat: 28223 . COSPAR: 2004-012D. Apogee: 532 km (330 mi). Perigee: 339 km (210 mi). Inclination: 97.7000 deg. Period: 93.30 min. The announced mass of the two satellites launched was far less than the payload capability of the CZ-2C. It was believed that an unannounced military satellite may have been orbited. Object 2004-12D was in a much lower perigee orbit of 350 x 606 km x 97 deg and may have separated prior to second stage vernier cutoff.

2008 April 18 - . 22:17 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA3. LV Family: Ariane 5. Launch Vehicle: Ariane 5ECA. LV Configuration: Ariane 5ECA V539.
  • Vinasat 1 - . Mass: 6,740 kg (14,850 lb). Nation: Vietnam. Agency: Arianespace. Class: Communications. Type: Civilian communications satellite. Spacecraft: AS 2100. USAF Sat Cat: 32767 . COSPAR: 2008-018A. Apogee: 35,789 km (22,238 mi). Perigee: 35,787 km (22,236 mi). Inclination: 0.0000 deg. Period: 1,436.20 min. Summary: First satellite launched by Vietnam. The Vietnam Post and Telecom Corporation communications satellite was equipped with C and Ku band payloads..
  • Star One C2 - . Payload: Spacebus 3000B3. Nation: Brazil. Agency: Arianespace. Program: Brasilsat. Class: Communications. Type: Civilian communications satellite. Spacecraft: Spacebus 3000. USAF Sat Cat: 32768 . COSPAR: 2008-018B. Apogee: 35,790 km (22,230 mi). Perigee: 35,785 km (22,235 mi). Inclination: 0.1000 deg. Period: 1,436.10 min. Summary: Communications satellite owned by Brazilian operator Star One with C, Ku and X-band transponders.

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