Encyclopedia Astronautica
OSCAR


American agency. Orbiting Satellite Carrying Amateur Radio, USA.

More... - Chronology...


Associated Countries
See also
  • Agency Agencies or institutions overseeing design, development, construction, or operation of space-related systems. More...

Associated Programs
  • 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...

OSCAR Chronology


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.

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