Encyclopedia Astronautica
Oscar


Amateur radio satellite network. For over a third of a century a series of OSCAR satellites have been launched in a variety of configurations and by many nations.

More... - Chronology...


Associated Countries
  • Argentina The Argentine Interplanetary Society was organized in the 1940's. In 1952 Argentina was one of the founding members of the International Astronautical Federation. From 1960 the Comision Nacional de Investigaciones Espaciales (CNIE) worked with the Argentine Air Force's Instituto de Investigaciones Aeronauticas y Espaciales (IIAE) to develop indigenous sounding rockets and missiles. Argentina was the first country in Latin America to send an object into space using an indigenously-developed rocket. In the 1980's Argentina took part in a multinational effort to develop the Condor intermediate range missile. Under American pressure, the Condor Program was canceled in 1991, the IIAE and CNIE were dismantled, and further work on launch vehicles was banned. A new civilian space agency, CONAE was created, which concentrated on development of surveillance satellites for earth resource and environmental monitoring. More...
  • Korea South South Korea became familiar with large-scale rocketry through maintenance and modification activities on American-supplied Honest John and Nike Hercules tactical missiles. By the 1990's Korea had developed an independent capability to manufacture solid propellant rocket motors of up to one tonne mass. In 1990 KARI was funded to build the first indigenous sounding rockets, flown as the KSR-I and KSR-II. In December 1997 KARI was allowed to proceed with development of liquid oxygen/kerosene rocket motor for an orbital launcher, but this was abandoned when the South Korean government decided it wanted to be among the top ten spacefaring nations by 2015. The existing program was too limited in growth potential to allow that. Therefore it was decided to leapfrog the technology by contracting with Russian companies. First launch of the KSLV-I launch vehicle from the new space centre took place in 2010. More...

Associated Spacecraft
  • Oscar International series of amateur radio communications satellites. Operational, first launch 1961.12.12. Launched in a variety of configurations and by many nations. More...
  • MicroSat SSTL British technology satellite. 3 launches, 1981.10.06 (CERISE) to 1990.01.22 (Oscar 14). Original version of the Surrey Microsat bus. More...
  • MicroSat-70 British technology satellite. 14 launches, 1981.10.06 (Oscar 9) to 2002.11.28 (Picosat). Basic Surrey Microsat bus. More...
  • Informator Russian communications satellite. One launch, 1991.01.29, Oscar 21. Informator was the spacecraft component of the planned Koskon medium earth-orbit communications satellite system. More...
  • Kitsat South Korean technology satellite. 2 launches, 1993.09.26 (Oscar 23) to 1999.05.26 (Kitsat-3). South Korean indigenous 50-kg-class small satellite series, developed originally with technology transfer from Surrey Satellite Technology Ltd. More...
  • PS Model Russian amateur radio communications satellite. 2 launches, 1997.10.05 (Sputnik-40) to 1998.10.25 (Spoutnik-41). Two subscale models of Sputnik 1, were built by students for hand-launch from Mir on fortieth anniversary of Sputnik 1. More...

See also
Associated Launch Vehicles
  • Thor Agena B American orbital launch vehicle. Two stage vehicle consisting of 1 x Thor DM-21 + 1 x Agena B More...
  • Titan 3C American orbital launch vehicle. Titan 3A with five segment solid motors. Man-rated design originally developed for Dynasoar spaceplane. More...
  • Kosmos 11K65M Russian orbital launch vehicle. Definitive and prolific production version of satellite launcher based on Yangel R-14 IRBM. After further development at NPO Polyot (Omsk, Chief Designer A S Klinishkov), the modified Kosmos-3M added a restartable second stage with an orientation system. This booster was launched form two 'Cusovaya' launch complexes from 1967. The second stage used low thrust rockets using gas generator output to adjust the final velocity of the stage More...
  • Delta N6 American orbital launch vehicle. Three stage vehicle consisting of 6 x Castor 2 + 1 x LT Thor DSV-2L-1C + 1 x Delta E More...
  • Delta 0300 American orbital launch vehicle. Three stage vehicle consisting of 3 x Castor 2 + 1 x LT Thor DSV-2L-1C + 1 x DSV-3N-4 More...
  • Soyuz 11A511U Russian standardised man-rated orbital launch vehicle derived from the original R-7 ICBM of 1957. It has been launched in greater numbers than any orbital launch vehicle in history. Not coincidentally, it has been the most reliable as well. After over 40 years service in Russia, ESA built a new launch pad at Kourou which will keep it in service from three launch sites in three countries well into the mid-21st Century. More...
  • Delta 2310 American orbital launch vehicle. Three stage vehicle consisting of 3 x Castor 2 + 1 x ELT Thor/RS-27 + 1 x Delta P /TR-201 More...
  • Delta 2910 American orbital launch vehicle. Three stage vehicle consisting of 9 x Castor 2 + 1 x ELT Thor/RS-27 + 1 x Delta P /TR-201 More...
  • Ariane 1 French orbital launch vehicle. First version of the Ariane launch vehicle. More...
  • Delta 3920 American orbital launch vehicle. Three stage vehicle consisting of 9 x Castor 4A + 1 x ELT Thor/RS-27 + 1 x Delta K More...
  • H-1 Japanese license-built version of Delta launch vehicle, with Japanese-developed upper stages. More...
  • Ariane 44LP French orbital launch vehicle. Ariane 4 with 2 liquid rocket + 2 solid rocket strap-ons. More...
  • Ariane 40 French orbital launch vehicle. 3 stage core vehicle with original Ariane H10 upper stage. A fully fueled Ariane core cannot lift off the ground without strap-on liquid or solid motors. When Ariane 4 is launched in this configuration, the propellant tanks of the first and second stages are not completely filled. More...
  • Ariane 42P French orbital launch vehicle. Ariane 4 with 2 solid rocket strap-ons. More...
  • Ariane 42L French orbital launch vehicle. Ariane 4 with 2 liquid rocket strap-ons. More...
  • Start Russian orbital launch vehicle. Launch vehicle based on decommissioned SS-25 ICBM's (differs from ICBM/basic Start-1 in having second stage used twice, in tandem, for increased payload). Launched from mobile transporter. Liftoff mass 60 tonnes. More...

Associated Manufacturers and Agencies
  • USAF American agency overseeing development of rockets and spacecraft. United States Air Force, USA. More...
  • RVSN Russian agency overseeing development of spacecraft. Raketniye Voiska Stratigcheskovo Naznacheniya (Russian Strategic Rocket Forces), Russia. More...
  • OSCAR American agency. Orbiting Satellite Carrying Amateur Radio, USA. More...
  • AMSAT Citizen of the World agency overseeing development of spacecraft. Amateur Satellite Corp - Branches in various countries, International. More...
  • ESA European agency overseeing development of rockets and spacecraft. European Space Agency, Europe. More...
  • Surrey British manufacturer of spacecraft. Surrey Satellite Technologies Ltd. , Guildford, UK More...
  • Weber American manufacturer of spacecraft. Weber State University, Utah, USA. More...
  • JARL Japanese agency overseeing development of spacecraft. Japanese Amateur Radio League, Japan. More...
  • ACF French agency overseeing development of spacecraft. Aero Club de France, Paris, France. More...
  • TUB German manufacturer of spacecraft. Technische Universitaet Berlin, Berlin, Germany. More...
  • KAIST South Korean manufacturer of spacecraft. Korea Advanced Institute for Space Technology, Korea South. More...
  • RAKA Russian agency overseeing development of spacecraft. Russian Aviation and Space Agency (Rosaviakosmos), Moscow, Russia. More...
  • UNAM Mexican agency. Autonomous University of Mexico, Mexico City, Mexico. More...
  • AFR Russian manufacturer. Astronautical Federation of Russia, Russia. More...

Associated Launch Sites
  • Cape Canaveral America's largest launch center, used for all manned launches. Today only six of the 40 launch complexes built here remain in use. Located at or near Cape Canaveral are the Kennedy Space Center on Merritt Island, used by NASA for Saturn V and Space Shuttle launches; Patrick AFB on Cape Canaveral itself, operated the US Department of Defense and handling most other launches; the commercial Spaceport Florida; the air-launched launch vehicle and missile Drop Zone off Mayport, Florida, located at 29.00 N 79.00 W, and an offshore submarine-launched ballistic missile launch area. All of these take advantage of the extensive down-range tracking facilities that once extended from the Cape, through the Caribbean, South Atlantic, and to South Africa and the Indian Ocean. More...
  • Vandenberg Vandenberg Air Force Base is located on the Central Coast of California about 240 km northwest of Los Angeles. It is used for launches of unmanned government and commercial satellites into polar orbit and intercontinental ballistic missile test launches toward the Kwajalein Atoll. More...
  • Baikonur Russia's largest cosmodrome, the only one used for manned launches and with facilities for the larger Proton, N1, and Energia launch vehicles. The spaceport ended up on foreign soil after the break-up of Soviet Union. The official designations NIIP-5 and GIK-5 are used in official Soviet histories. It was also universally referred to as Tyuratam by both Soviet military staff and engineers, and the US intelligence agencies. Since the dissolution of the Soviet Union the Russian Federation has insisted on continued use of the old Soviet 'public' name of Baikonur. In its Kazakh (Kazak) version this is rendered Baykonur. More...
  • Plesetsk Plesetsk was the Soviet Union's northern cosmodrome, used for polar orbit launches of mainly military satellites, and was at one time the busiest launch centre in the world. The collapse of the Soviet Union put the main launch site of Baikonur in Kazakh territory. It now seems that once the Proton rocket is retired, Baikonur will be abandoned and Plesetsk will be Russia's primary launch centre. Upgrades to existing launch facilities will allow advanced versions of the Soyuz rocket and the new Angara launch vehicle to be launched from Plesetsk. Plesetsk's major drawback was the lower net payload in geosynchronous orbit from a northern latitude launch site. However Russia is planning to remove the disadvantage by looping geosynchronous satellites around the moon, using lunar gravity to make the necessary orbital plane change. More...
  • Tanegashima Japan's main launch site for he larger N and H launch vehicles. In use for sounding rockets from 1967 and orbital launches from 1975. As of 2007 over 140 major launches had been made from the site. More...
  • Kourou After the agreement with newly independent Algeria for France to evacuate their launch sites in that country, a location near Biscarosse was selected for French missile testing. However since only launches westwards across the Bay of Biscay could be made from this site, it was unsuitable for France's Diamant orbital launch vehicle. After reviewing 14 potential sites, a location in the South American French colony of Guiana was selected. This would allow over-water launches to a tremendous range of possible orbital inclinations -- from -100.5 deg to 1.5 deg. Being near the equator, it would provide the maximum assist from the earth's rotation for launches into equatorial orbits. The decision was formalized in April 1964 and in July 1966 ELDO chose the site for future launches of the Europa II launch vehicle. More...

Oscar Chronology


1961 December 12 - . 20:40 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thor Agena B. LV Configuration: Thor Agena B 325 / Agena B 1119.
  • Oscar 1 - . Mass: 5.00 kg (11.00 lb). Nation: USA. Agency: USAF. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. Decay Date: 1962-01-31 . USAF Sat Cat: 214 . COSPAR: 1961-A-Kappa-2. Apogee: 474 km (294 mi). Perigee: 245 km (152 mi). Inclination: 81.2000 deg. Period: 91.80 min. The first Oscar Phase I amateur satellite was launched piggyback with Discover 36. A group of enthusiasts in California formed Project OSCAR and persuaded the United States Air Force to replace ballast on the Agena upper stage with the 4.5 kg OSCAR I package. The satellite was box shaped with a single monopole antenna and battery powered. The 140 mW transmitter onboard discharged its batteries after three weeks. 570 Amateurs in 28 countries reported receiving its simple 'HI-HI' morse code signals on the VHF 2 meter band (144.983 MHz) until January 1, 1962. The speed of the HI-HI message was controlled by a temperature sensor inside the spacecraft. OSCAR I re-entered the atmosphere January 31, 1962 after 312 revolutions. Additional Details: here....

1962 June 2 - . 00:31 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thor Agena B. LV Configuration: Thor Agena B 335 / Agena B 1127.
  • Oscar 2 - . Mass: 10 kg (22 lb). Nation: USA. Agency: USAF. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. Decay Date: 1962-06-21 . USAF Sat Cat: 305 . COSPAR: 1962-Chi-2. Apogee: 339 km (210 mi). Perigee: 188 km (116 mi). Inclination: 74.2000 deg. Period: 89.80 min. OSCAR II was launched piggyback with a United States Air Force satellite. OSCAR II was very similar to OSCAR I. Differences included (1) changing the surface thermal coatings to achieve a cooler internal spacecraft environment, (2) modifying the sensing system so the satellite temperature could be measured accurately as the batteries decayed, and (3) lowering the transmitter power output to 100 mW to extend the life of the onboard battery. OSCAR II lasted 18 days ceasing operation on June 20, 1962 and re-entered June 21, 1962.

1965 March 9 - . 18:29 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2W. LV Family: Delta. Launch Vehicle: Thor Agena D SLV-2. LV Configuration: Thor SLV-2 Agena D 419 / Agena D SS-01A 2701.
  • Oscar 3 - . Mass: 14 kg (30 lb). Nation: USA. Agency: OSCAR. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 1293 . COSPAR: 1965-016F. Apogee: 900 km (550 mi). Perigee: 876 km (544 mi). Inclination: 70.1000 deg. Period: 102.80 min. OSCAR III was launched piggyback with seven United States Air Force satellites. Weight 16.3 kg. It was the first amateur satellite to operate from solar power and relay signals from Earth. OSCAR III was the first true amateur satellite relaying voice contacts in the VHF 2 meter band through a 1 W 50 kHz wide linear transponder (146 MHz uplink and 144 MHz downlink). OSCAR III's transponder lasted 18 days. More than 1000 amateurs in 22 countries communicated through the linear transponder. The two beacon transmitters continued operating for several months.

    Note: Designed, built, and tested, a predecssor, OSCAR* was never launched. Similar in design to OSCAR I and II, OSCAR* contained a 250 mW beacon with phase-coherent keying. OSCAR* was never launched as the workers decided to focus their efforts on the first relay satellite -- OSCAR III.


1965 December 21 - . 14:00 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC41. LV Family: Titan. Launch Vehicle: Titan 3C. LV Configuration: Titan IIIC 3C-8.
  • Oscar 4 - . Mass: 13 kg (28 lb). Nation: USA. Agency: OSCAR. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. Decay Date: 1976-04-12 . USAF Sat Cat: 1902 . COSPAR: 1965-108C. Apogee: 33,549 km (20,846 mi). Perigee: 162 km (100 mi). Inclination: 26.8000 deg. Period: 587.50 min. OSCAR IV was launched piggyback with three United States Air Force satellites. The launch vehicle had a partial failure and placed the spacecraft in a low orbit preventing widespread amateur use. Orbit 29120 x 168 km. Inclination 26.8 degrees. Period 587.5 minutes. Weight 18.1 kg. Four monopole antennas. OSCAR IV was built by the TRW Radio Club of Redondo Beach, California. It had a 3 Watt 10 kHz wide linear transponder (144 MHz uplink and 432 MHz downlink). In operation until March 16, 1966. Re-entry April 12, 1976. Total operation 85 days. OSCAR IV provided the first US-Soviet amateur link.

1970 January 23 - . 11:31 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2W. LV Family: Delta. Launch Vehicle: Delta N6. LV Configuration: Thor Delta N6 542/D76.
  • Oscar 5 - . Payload: Australis-Oscar 5. Mass: 18 kg (39 lb). Nation: Australia. Agency: Clemson. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 4321 . COSPAR: 1970-008B. Apogee: 1,478 km (918 mi). Perigee: 1,434 km (891 mi). Inclination: 101.8000 deg. Period: 115.00 min. Australis-OSCAR 5 was launched piggyback with ITOS-1 (TIROS-M weather satellite. Weight 17.7 kg (9 kg of which was battery mass). Box shaped 304 x 431 x 152 mm. 2 meter monopole and 10 meter dipole antennas. It was the first amateur satellite to be remotely controlled. Built by students at The University of Melbourne, Melbourne, Victoria, Australia. Battery powered, Australis-OSCAR 5 transmitted telemetry on both 2 meter (144.050 MHz at 50 mW) and 10 meter (29.450 MHz at 250 mW) bands that operated for 23 and 46 days respectively. Passive magnetic attitude stabilization was performed by carrying two bar magnets to align with the Earth's magnetic field in order to provide a favorable antenna footprint. The University of Melbourne compiled tracking reports from hundreds of stations in 27 countries.

1972 October 15 - . 17:19 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2W. LV Family: Delta. Launch Vehicle: Delta 0300. LV Configuration: Delta 0300 575/D91.
  • Oscar 6 - . Payload: Amsat-Oscar-6. Mass: 16 kg (35 lb). Nation: USA. Agency: AmSat. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 6236 . COSPAR: 1972-082B. Apogee: 1,455 km (904 mi). Perigee: 1,449 km (900 mi). Inclination: 101.7000 deg. Period: 114.90 min. AMSAT-OSCAR 6 was launched piggyback with ITOS-D (NOAA 2). AO-6 was the first phase 2 satellite (Phase II-A). Weight 16 kg. Box shaped 430 x 300 x 150 mm. Quarter-wave monopole antennas (144 and 435 MHz) and half-wave dipole antenna (29 MHz). Firsts: complex control system using discrete logic; satellite-to-satellite relay communication via AO-7; demonstrated doppler-location of ground station for search and rescue; demonstrated low-cost medical data relay from remote locations. Equipped with solar panels powering NiCd batteries, AO-6 provided 24 V at 3.5 W power to three transponders. It carried a Mode A transponder (100 kHz wide at 1 W) and provided store-and-forward morse and teletype messages (named Codestore) for later transmission. AO-6 lasted 4.5 years until a battery failure ceased operation on June 21, 1977. Subsystems were built in the United States, Australia, and Germany.

1974 November 15 - . 17:11 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2W. LV Family: Delta. Launch Vehicle: Delta 2310. LV Configuration: Delta 2310 592/D104.
  • Oscar 7 - . Payload: Amsat-Oscar-7. Mass: 29 kg (63 lb). Nation: USA. Agency: AmSat. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 7530 . COSPAR: 1974-089B. Apogee: 1,459 km (906 mi). Perigee: 1,440 km (890 mi). Inclination: 101.8000 deg. Period: 114.90 min. AMSAT-OSCAR 7 was launched piggyback with ITOS-G (NOAA 4) and the Spanish INTASAT. The second phase 2 satellite (Phase II-B). Weight 28.6 kg. Octahedrally shaped 360 mm high and 424 mm in diameter. Circularly polarized canted turnstile VHF/UHF antenna system and HF dipole. Firsts: Satellite-to-satellite relay communication via AO-6; Early demonstrations of low-budget medical data relay and doppler location of ground transmitters for search-and-rescue operations were done using this satellite. AO-7 was fully operational for 6.5 years until a battery failed in mid 1981. However the satellite was still functional in day-side passes when its ever-degrading solar cells could function, and was still responding to amateurs as of August 2006. Additional Details: here....

1978 March 5 - . 17:54 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2W. LV Family: Delta. Launch Vehicle: Delta 2910. LV Configuration: Delta 2910 621/D139.
  • Oscar 8 - . Payload: Amsat-Oscar-8. Mass: 27 kg (59 lb). Nation: USA. Agency: AmSat. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 10703 . COSPAR: 1978-026B. Apogee: 903 km (561 mi). Perigee: 894 km (555 mi). Inclination: 99.2000 deg. Period: 103.00 min. AMSAT-OSCAR 8 was launched piggyback with LandSat 3 (ERTS 3) and PIX. The third phase 2 satellite (Phase II-D). Weight 27.2 kg. Box shaped, 33 cm high, 38 x 38 cm. Circularly polarized VHF canted turnstile, UHF quarter wave monopole, and HF half-wave dipole antenna system. Another cooperative international effort (United States, Canada, Germany and Japan). AO-8 had a similar store-and-forward service as AO-7 and carried Mode A (145.850-900 MHz uplink and 29.400-500 MHz downlink) and Mode J (145.900-146.000 MHz uplink and 435.100 MHz downlink (inverted)) linear transponders and telemetry beacons on 435.095 MHz and 29.402 MHz. AO-8's primary mission was for educational applications and amateur communications. It was in operation for six years until the battery failed on June 24, 1983.

1980 May 23 - . 14:29 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA1. LV Family: Ariane. Launch Vehicle: Ariane 1. LV Configuration: Ariane 1 L02. FAILURE: Failure.
  • Amsat Phase 3A - . Payload: Amsat Phase 3A. Nation: USA. Agency: ESA. Program: Oscar. Spacecraft: Oscar. COSPAR: F800523F. Summary: The satellite never obtained orbit. Weight 92.2 kg. Mode B (435 MHz uplink and 145 MHz downlink) transponder and 145 MHz beacon. VHF and UHF helix wide beam antenna..

1981 October 6 - . 11:27 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2W. LV Family: Delta. Launch Vehicle: Delta 2310. LV Configuration: Delta 2310 639/D157.
  • Oscar 9 - . Payload: UoSAT 1. Mass: 52 kg (114 lb). Nation: UK. Agency: Surrey. Manufacturer: Surrey. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Microsat SSTL. Decay Date: 1989-10-13 . USAF Sat Cat: 12888 . COSPAR: 1981-100B. Apogee: 374 km (232 mi). Perigee: 372 km (231 mi). Inclination: 97.6000 deg. Period: 92.00 min. University of Surrey research microsatellite. Radio science; also carried amateur radio package. Communication and geophysics research satellite. Launch time 1127 GMT. Also registered by the United States in ST/SG/SER.E/59, with category D and orbital parameters 95.3 min, 531 x 533 km x 97.5 deg. UoSAT-OSCAR 9 was launched piggyback with Solar Mesosphere Explorer satellite. Weight 52 kg. Box shaped 740 x 420 x 420 mm. Deployable gravity gradient boom. Firsts: First on-board computer (IHU - Integrated Housekeeping Unit) for battery and attitude management, remote control, and experiments. Built by the University of Surrey in the United Kingdom, UO-9 was UoSAT's first experimental satellite. It was a scientific and educational low-Earth orbit satellite containing many experiments and beacons but no amateur transponders. UO-9 was fully operational until it re-entered October 13, 1989 from a decaying orbit after nine years of service.

1983 June 16 - . 11:59 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA1. LV Family: Ariane. Launch Vehicle: Ariane 1. LV Configuration: Ariane 1 L6.
  • Oscar 10 - . Payload: Phase 3B. Mass: 70 kg (154 lb). Nation: Germany. Agency: AmSat. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 14129 . COSPAR: 1983-058B. Apogee: 35,442 km (22,022 mi). Perigee: 4,007 km (2,489 mi). Inclination: 27.2000 deg. Period: 699.50 min. AMSAT Oscar 10, registration no D-R 001. Scientific and communication satellite for the amateur radio service. Frequency plan: Transponder U: 435.1 MHz (uplink), 145.9 MHz (downlink), Bandwidth +/- 75 kHz. Transponder L: 1269.45 MHz (uplink), 436.55 MHz ( downlink), bandwidth +/- 400 kHz. Two beacons adjacent to passband. Launch vehicle Ariane L6. First amateur satellite with onboard propulsion (which did not function entirely correctly, due to collision with launch vehicle after separation - hence the not-quite-Molniya-orbit). Computer control failed December 1986 due to radiation damage to memory. As a result, ground control stations have no control over the spacecraft. However, when the orientation is favourable (with respect to the Earth and Sun), OSCAR 10 continues to provide good Mode B service. If users coorperate, OSCAR 10 may provide many more years of service. Project Management: AMSAT-NA (Jan King, W3GEY) and AMSAT-DL (Karl Meinzer, DJ4ZC). Spacecraft sub-systems: Contributed by groups in Canada, Hungary, Japan, United States and West Germany. Spacecraft: Spin Stabilised with Magnetorquers: Power: 50 W solar array, 2 NiCd batteries. Payload: Transponders/Beacons: Mode B: Type: Linear, inverting, 50W; General Beacon: 145.809 MHz (Carrier); Engineering Beacon: 145.987 MHz; Uplink: 435.030-435.180 MHz; Downlink: 145.975-145.825 MHz. Mode L (no longer operational): Type: Linear, inverting, 50W: Beacons: 436.020, 436.040 MHz; Uplink 1269.450 MHz (800 kHz); Downlink 436.550 MHz.

1984 March 1 - . 17:59 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2W. LV Family: Delta. Launch Vehicle: Delta 3920. LV Configuration: Delta 3920 D174.
  • Oscar 11 - . Payload: UoSAT 2. Mass: 52 kg (114 lb). Nation: UK. Agency: Surrey. Manufacturer: Surrey. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Microsat SSTL. USAF Sat Cat: 14781 . COSPAR: 1984-021B. Apogee: 670 km (410 mi). Perigee: 651 km (404 mi). Inclination: 97.8000 deg. Period: 98.00 min. University of Surrey experimental microsatellite. Built in only 6 months, UoSAT-2 carried the first modern digital store and forward (S&F) communications payload and a prototype CCD camera. Also performed magnetospheric studies. Launch time 1759 GMT. Still operational in 2000.

1986 August 12 - . 20:45 GMT - . Launch Site: Tanegashima. Launch Complex: Tanegashima N. LV Family: Delta. Launch Vehicle: H-1. LV Configuration: H-1 H-15(F).
  • Oscar 12 - . Payload: JAS-1. Mass: 50 kg (110 lb). Nation: Japan. Agency: JARL. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 16909 . COSPAR: 1986-061B. Apogee: 1,497 km (930 mi). Perigee: 1,479 km (919 mi). Inclination: 50.0000 deg. Period: 115.70 min. Japanese Amateur Satellite. JAS-1 (Fuji). Amateur satellite communications. Development of amateur satellite technology. Launch vehicle H-I (two-stage) test flight no. 1. Launch time 2045 GMT. Launching organization NASDA. Fuji-OSCAR 12 was launched piggyback with a Japanese experimental geodetic satellite Ajisai (EGS). Weight 50 kg. 26-sided polyhedron, 40 x 40 x 47 cm. FO-12 was the first Japanese amateur satellite developed by the Japan Amateur Radio League (English version) with system design and integration performed at NEC. FO-12 was taken out of service November 5, 1989 because of battery failure.

1988 June 15 - . 11:19 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA2. LV Family: Ariane. Launch Vehicle: Ariane 44LP. LV Configuration: Ariane 44LP V22.
  • Oscar 13 - . Payload: Phase 3C. Mass: 150 kg (330 lb). Nation: USA. Agency: AmSat. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. Decay Date: 1996-12-06 . USAF Sat Cat: 19216 . COSPAR: 1988-051B. Apogee: 37,995 km (23,608 mi). Perigee: 809 km (502 mi). Inclination: 57.9000 deg. Period: 686.60 min. AMSAT-OSCAR 13 was launched by the first test flight of the Ariane 4 launcher. Size 600 x 40 x 200 mm. AO-13 was the third in a series of Phase-3 type high-altitude, elliptical orbit amateur communications satellites. It was built by an international team of radio amateurs led by Dr. Karl Meinzer of AMSAT-Germany. It carried four beacon transmitters and four linear transponders. AO-13 also contained a digital communications transponder called RUDAK-1. However attempts to get the experiment operating failed. Operational life span was 8 years. Careful analysis of AO-13's orbit in early 1990 by Victor Kudelka, OE2VKW revealed that resonant perturbations exist which lead the satellite into a negative perigee altitude. The perigee was down to 150 km by August 1996 which drastically increased atmospheric drag on the satellite until it reentered the Earth's atmosphere December 5, 1996.

1990 January 22 - . 01:35 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA2. LV Family: Ariane. Launch Vehicle: Ariane 40. LV Configuration: Ariane 40 V35.
  • Oscar 14 - . Payload: UoSAT 3. Mass: 46 kg (101 lb). Nation: UK. Agency: Surrey. Manufacturer: Surrey. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Microsat SSTL. USAF Sat Cat: 20437 . COSPAR: 1990-005B. Apogee: 797 km (495 mi). Perigee: 781 km (485 mi). Inclination: 98.6000 deg. Period: 100.70 min. University of Surrey experimental satellite. The first of Surrey Satellite Technology Ltd's modular microsatellites. Launched on the Ariane ASAP; carried an operational store and forward communications payload with extensive radiation monitoring experiments for SatelLife and Data Trax Inc (USA). Still operational in 2000. Owner/operator University of Surrey, Dept of Electronic and Electrical Engineering, Guildford, Surrey GU2 5XH.
  • Oscar 15 - . Payload: UoSAT 4. Mass: 48 kg (105 lb). Nation: UK. Agency: Surrey. Manufacturer: Surrey. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: MicroSat-70. USAF Sat Cat: 20438 . COSPAR: 1990-005C. Apogee: 798 km (495 mi). Perigee: 784 km (487 mi). Inclination: 98.6000 deg. Period: 100.70 min. Technology demonstration mission carrying transponder, solar cell, CCD camera technology experiments. Customer: University of Surrey/European Space Agency. Launched alongside UoSAT-3, the microsatellite operated perfectly for 2 days before a failure occured in the downlink. Owner/operator University of Surrey, Dept of Electronic and Electrical Engineering, Guildford, Surrey GU2 5XH. Box shaped 350 x 350 x 650 mm. Four solar panels and 6 m gravity gradient boom.
  • Oscar 16 - . Payload: PACSAT. Mass: 12 kg (26 lb). Nation: USA. Agency: Arianespace. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 20439 . COSPAR: 1990-005D. Apogee: 797 km (495 mi). Perigee: 781 km (485 mi). Inclination: 98.6000 deg. Period: 100.60 min. Summary: Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .
  • Oscar 17 - . Payload: Microsat 2. Mass: 12 kg (26 lb). Nation: Brazil. Agency: Arianespace. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 20440 . COSPAR: 1990-005E. Apogee: 796 km (494 mi). Perigee: 780 km (480 mi). Inclination: 98.6000 deg. Period: 100.60 min.
  • Oscar 18 - . Payload: Webersat. Mass: 12 kg (26 lb). Nation: USA. Agency: Weber. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 20441 . COSPAR: 1990-005F. Apogee: 797 km (495 mi). Perigee: 780 km (480 mi). Inclination: 98.6000 deg. Period: 100.60 min. Summary: Carried Earth imaging camera. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .
  • Oscar 19 - . Payload: LuSat. Mass: 12 kg (26 lb). Nation: Argentina. Agency: Arianespace. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 20442 . COSPAR: 1990-005G. Apogee: 797 km (495 mi). Perigee: 779 km (484 mi). Inclination: 98.6000 deg. Period: 100.60 min. Summary: Carried CCD camera..

1990 February 7 - . 01:33 GMT - . Launch Site: Tanegashima. Launch Complex: Tanegashima N. LV Family: Delta. Launch Vehicle: H-1. LV Configuration: H-1 H-21(F).
  • Oscar 20 - . Payload: JAS 1b. Mass: 50 kg (110 lb). Nation: Japan. Agency: JARL. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 20480 . COSPAR: 1990-013C. Apogee: 1,745 km (1,084 mi). Perigee: 912 km (566 mi). Inclination: 99.0000 deg. Period: 112.20 min. Summary: JAS-1b 'Fuji-2'. Continuation of amateurradio services of JAS-1; extension of amateur radio communications area; advancement of amateur radio technology. Launching organization NASDA. Launch time 0133 UT..

1991 January 29 - . 11:59 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC133/3. LV Family: Kosmos 3. Launch Vehicle: Kosmos 11K65M. LV Configuration: Kosmos 11K65M 53744-158.
  • Oscar 21 - . Payload: Informator s/n 1. Mass: 600 kg (1,320 lb). Nation: USSR. Agency: MO. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Informator. USAF Sat Cat: 21087 . COSPAR: 1991-006A. Apogee: 1,008 km (626 mi). Perigee: 956 km (594 mi). Inclination: 82.9000 deg. Period: 104.70 min. Prototype satellite for the planned Koskon (Space Conversion) Global Space Communication System. It was planned that the Koskon constellation would consist of a constellation of 32 to 45 satellites in 1997-2001. Also carried amateur radio transponders and performed geological research. Routine communications, collection and relaying of information in the interests of the Ministry of Geology of the USSR and other branches of the country's national economy, and the development of communications between amateur radio-operators.

1991 July 17 - . 01:46 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA2. LV Family: Ariane. Launch Vehicle: Ariane 40. LV Configuration: Ariane 40 V44.
  • Oscar 22 - . Payload: UoSAT 5. Mass: 50 kg (110 lb). Nation: UK. Agency: TUB. Manufacturer: Surrey. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: MicroSat-70. USAF Sat Cat: 21575 . COSPAR: 1991-050B. Apogee: 772 km (479 mi). Perigee: 759 km (471 mi). Inclination: 98.5000 deg. Period: 100.20 min. Summary: Customer: SateLife. Carried store and forward communications and Earth observation payloads, replacing those lost on UoSAT-4. Still operational in 2000..

1992 August 10 - . 23:08 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA2. LV Family: Ariane. Launch Vehicle: Ariane 42P. LV Configuration: Ariane 42P V52.
  • Oscar 23 - . Payload: Kitsat-A. Mass: 50 kg (110 lb). Nation: Korea South. Agency: KAIST. Manufacturer: Surrey. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: MicroSat-70. USAF Sat Cat: 22077 . COSPAR: 1992-052B. Apogee: 1,322 km (821 mi). Perigee: 1,310 km (810 mi). Inclination: 66.1000 deg. Period: 111.90 min. Summary: Korean's first satellite achieved via a technology transfer programme with Surrey Satellite Technology Ltd. Carried store and forward communications, DSP and Earth observation payloads. Still operational in 2000..

1993 May 12 - . 00:56 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA2. LV Family: Ariane. Launch Vehicle: Ariane 42L. LV Configuration: Ariane 42L V56.
  • Oscar 29 - . Payload: Arsene. Mass: 154 kg (339 lb). Nation: France. Agency: RACE. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 22654 . COSPAR: 1993-031B. Apogee: 36,582 km (22,730 mi). Perigee: 17,469 km (10,854 mi). Inclination: 5.3000 deg. Period: 1,012.60 min. Summary: Operated by Radio Amateur Club de LeSpace..

1993 September 26 - . 01:45 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA2. LV Family: Ariane. Launch Vehicle: Ariane 40. LV Configuration: Ariane 40 V59.
  • Posat 1 - . Payload: Oscar 28. Mass: 50 kg (110 lb). Nation: Portugal. Agency: INETI. Manufacturer: Surrey. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: MicroSat-70. USAF Sat Cat: 22826 . COSPAR: 1993-061D. Apogee: 801 km (497 mi). Perigee: 789 km (490 mi). Inclination: 98.3000 deg. Period: 100.80 min. Summary: Portugal's first satellite achieved through a technology transfer programme with Surrey Satellite Technology Ltd. Carried store and forward, DSP communications, GPS and Earth observation payloads. Still operational in 2000.. Additional Details: here....
  • Eyesat 1 - . Payload: Oscar 27. Mass: 12 kg (26 lb). Nation: USA. Agency: Interfer. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 22829 . COSPAR: 1993-061G. Apogee: 803 km (498 mi). Perigee: 790 km (490 mi). Inclination: 98.7000 deg. Period: 100.80 min. Experimental Interferometric Microsatellite built by Interferometrics Inc, of Chantilly, Virginia. The satellite was also equipped with amateur radio equipment, constructed by AMRAD, a non-profit organization of radio amateurs, to conduct digital satellite communications experiments. The Amrad-Oscar-27 payload was an 'FM Repeater', consisting of a crystal controlled FM receiver operation at 145.850 MHz and a crystal controlled FM transmitter operating at approximately 436.795 MHz. Output power of the transmitter was normally 0.5 watts. Because of the satellite's limited power budget the amateur transmitter was on for only part of the daylight portion of each orbit. As of September 1998, the satellite passed its five year design goal.
  • Healthsat 2 - . Mass: 48 kg (105 lb). Nation: USA. Agency: Satelife. Manufacturer: Surrey. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: MicroSat-70. USAF Sat Cat: 22827 . COSPAR: 1993-061E. Apogee: 803 km (498 mi). Perigee: 789 km (490 mi). Inclination: 98.7000 deg. Period: 100.80 min. Customer: SateLife. Store and forward communications satellite operating in the SatelLife 'HealthNet' LEO satellite communications network for remote regions. Still operational as of 2000.

    Healthsat - II joined UoSAT-3/HealthSat-I as the second microsatellite in the HealthNet global communications system of SatelLife, a U.S. not-for-profit organisation. HealthNet, which was licensed in eighteen countries in Africa and Latin America, was providing desperately needed low cost 'last mile' communication links between medical institutions and health programmes in the developing world.

    The HealthSat-II mission was completed, from concept to launch, within one year. SSTL were responsible for all the programmatic aspects of the mission including procuring the launch slot on the Ariane ASAP and arranging suitable insurance for the launch and early commissioning phase - all within a total contract price of 1M. Additional Details: here....

  • Kitsat-2 - . Payload: Oscar 25. Mass: 49 kg (108 lb). Nation: Korea South. Agency: KAIST. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Kitsat. USAF Sat Cat: 22825 . COSPAR: 1993-061C. Apogee: 801 km (497 mi). Perigee: 790 km (490 mi). Inclination: 98.3000 deg. Period: 100.80 min. KITSAT-OSCAR 25 was a South Korean experimental microsatellite based on the SSTL UoSAT bus built by the Korean Advanced Institute of Science and Technology (KAIST). KO-25 was operated from The Satellite Technology Research Center (SaTReC) in South Korea. KO-25's mission was to take CCD pictures, process numerical information, measure radiation, and receive and forward messages. The Infrared Sensor Experiment (IREX) was designed to acquire I/V characteristics of IR sensors. A passive cooling structure was devised for this experiment. KO-25 was eventually operated purely as a packet store-and-forward satellite.

1995 March 28 - . 10:00 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC158. LV Family: Topol. Launch Vehicle: Start. FAILURE: Fell in Sea of Okhotsk..
  • Oscar 29 - . Payload: ENB UNAMSAT A. Nation: Mexico. Agency: RVSN. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. COSPAR: F950328C. Summary: UNAMSAT was an AMSAT Microsat class amateur radio satellite built by UNAM, the Autonomous University of Mexico..

1996 September 5 - . 12:47 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC132/1. LV Family: Kosmos 3. Launch Vehicle: Kosmos 11K65M.
  • Oscar 30 - . Payload: UNAMSAT B. Nation: Mexico. Agency: UNAM. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: Oscar. USAF Sat Cat: 24305 . COSPAR: 1996-052B. Apogee: 1,010 km (620 mi). Perigee: 966 km (600 mi). Inclination: 82.9000 deg. Period: 104.90 min.

1997 October 5 - . 15:08 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. LV Family: R-7. Launch Vehicle: Soyuz 11A511U.
  • Sputnik-40 - . Payload: Spoutnik 40 Ans / RS-17. Nation: Russia. Agency: RAKA. Manufacturer: AFR. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: PS Model. Decay Date: 1998-05-21 . USAF Sat Cat: 24958 . COSPAR: 1997-058C. Apogee: 378 km (234 mi). Perigee: 369 km (229 mi). Inclination: 51.6000 deg. Period: 87.10 min. Summary: Subscale model of the first Spuntik, hand-launched by Mir crew during an EVA. Transmitted radio signals..

1998 October 25 - . 04:14 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. LV Family: R-7. Launch Vehicle: Soyuz 11A511U. LV Configuration: Soyuz 11A511U 660.
  • Spoutnik-41 - . Nation: France. Agency: ACF; VVS. Manufacturer: AFR. Program: Oscar. Class: Communications. Type: Civilian communications satellite. Spacecraft: PS Model. Decay Date: 1999-01-11 . USAF Sat Cat: 25533 . COSPAR: 1998-062C. Apogee: 318 km (197 mi). Perigee: 313 km (194 mi). Inclination: 51.7000 deg. On a space walk from Mir on November 10, Padalka and Avdeyev hand-launched the Spoutnik-41 amateur-radio mini-satellite at around 19:30 GMT. Spoutnik-41, also designated RS-18, was another scale model of the first satellite, Sputnik 1, launched 41 years ago. It carried a small transmitter and was sponsored by Aero Club de France, AMSAT-France, and the Astronautical Federation of Russia. A similar model was launched in 1997 for the fortieth anniversary of Sputnik. On that occasion, two flight models were carried to Mir but only one was launched. The second Spoutnik-40 flight model was still aboard Mir as of 1998. The second Spoutnik-40 would perhaps be deployed prior to the abandonment of Mir in 1999.

1999 April 2 - . 11:28 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. LV Family: R-7. Launch Vehicle: Soyuz 11A511U.
  • Sputnik-99 - . Nation: France. Agency: AmSat. Program: Oscar. Class: Communications. Type: Amateur radio communications satellite. Spacecraft: OSCAR. Decay Date: 1999-07-29 . USAF Sat Cat: 25685 . COSPAR: 1999-015C. Apogee: 400 km (240 mi). Perigee: 400 km (240 mi). Inclination: 51.6000 deg. Summary: Subscale amateur radio model of Sputnik 1. Reentered July 29..

2000 November 16 - . Launch Site: Kourou. Launch Complex: Kourou ELA3. LV Family: Ariane 5. Launch Vehicle: Ariane 5G. LV Configuration: Ariane 5G V135 507.
  • AMSAT-Oscar-40 - . Mass: 4,758 kg (10,489 lb). Nation: Germany. Agency: AMSAT. Program: Oscar. Class: Communications. Type: Civilian communications satellite. Spacecraft: Oscar. USAF Sat Cat: 26609 . COSPAR: 2000-072B. Apogee: 58,650 km (36,440 mi). Perigee: 1,167 km (725 mi). Inclination: 7.5000 deg. Period: 1,146.50 min. The long-delayed Phase 3D amateur radio satellite, built by AMSAT-DL (Germany), was renamed AMSAT-Oscar-40 (AO-40) once launched. It carried an MBB S400 liquid engine (the backup engine for the Galileo Jupiter probe) and a variety of amateur radio payloads in L, S, C, X, V, U and K bands, as well as an ammonia arcjet thruster and a laser communications experiment. The satellite was the largest amateur satellite orbited to date and the first to feature deployable solar panels. Mass was 397 kg dry. The PAS 1R, STRV 1c/1d, and AMSAT Phase 3D satellites were placed in orbit on a single Ariane launch. At 0149 GMT the SBS cylindrical adapter which connected PAS-1R to AMSAT was jettisoned; 50 seconds later AMSAT separated from the EPS upper stage. Thereafter the spacecraft could not be contacted. Finally telemetry was received from after two weeks of silence, confirming that the satellite was still functioning.

2004 June 29 - . 06:30 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC109. Launch Pad: LC109/95. LV Family: R-36M. Launch Vehicle: Dnepr.
  • Amsat Echo - . Mass: 12 kg (26 lb). Nation: USA. Agency: AmSat. Program: Oscar. Class: Communications. Type: Civilian communications satellite. Spacecraft: Amsat Echo. USAF Sat Cat: 28375 . COSPAR: 2004-025K. Apogee: 818 km (508 mi). Perigee: 697 km (433 mi). Inclination: 98.3000 deg. Period: 100.00 min.

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