850 Sligo Ave. Suite 600
Silver Spring, MD 20910
fahnen/4.jpg Amateur Satellite Summary - UoSAT-OSCAR-11
Launch Pad Return

Satellite Summary

Name: UoSAT-OSCAR 11 (UoSAT-2)
NASA Catalog Number: 14781
Launched: March 1, 1984
Launch vehicle: Thor Delta 3920
Launched piggyback with: LANDSAT-5
Launch location: Vandenberg Air Force Base, Lompoc, California
Weight: 60 kg
Orbit: Polar LEO (Low Earth Orbit), circular, sun-synchronous 679 x 697 km.
Inclination: 98.25 degrees
Period: 99 Minutes
Size: 585 x 355 x 355 mm
Telemetry: 1200 bps FM AFSK


  • 145.825 MHz (most common)
  • 435.025 MHz
  • 2401.5 MHz
  • "Digitalker" Speech Synthesizer
  • Earth Imaging Camera (CCD)
  • Space Dust Impact Detectors
  • Geiger Counters
  • Digital Communications Experiment (DCE)
  • Operational digital store-and-forward communications payload
  • Prototype CCD camera
More Information:
  • The latest information is available from:


At 17:59 UTC on March 1, 1984, the second satellite designed and built by the University of Surrey's Spacecraft Engineering Research Group - UoSAT in the United Kingdom, UoSAT-2 (UO-11) was launched on a Delta rocket from the Western Test Range at Vandenberg Air Force Base, Lompoc, California with LANDSAT 5. It weighs 60 kg.

Among its many experiments, UoSAT-2 carried the Digital Communications Experiment, which was one of the first (if not the first) non-military use of store-and-forward techniques with Low Earth Orbiting Satellites. UoSAT-2 was the test-bed for the packet radio satellites as we know them today. (Thanks WD3Q)

For a more detailed description of UoSAT-11, read John Magliacane's, KD2BD, Spotlight On: UoSAT-OSCAR-11 originally published in The AMSAT Journal.

For more information also see UoSAT & SSTL Satellite Mission Summary and UoSAT-2 Microsatellite Mission.


  • Martin Sweeting, "The UoSAT-B Experimental Amateur Spacecraft," Orbit, Vol 5, No. 1, Jan/Feb 1984, pp 12-16; Amsat Satellite Report, No. 74, Mar 19, 1984.
  • Lyle Johnson, "The OSCAR-ll Packet Experiment," Proceedings of the ARRL 3rd Computer Networking Conference, Trenton, NJ, April 15, 1984, pp. 3.64-3.67.
  • Bernie Glassmeyer, "UoSAT-OSCAR 11 Launched (Amateur Satellite Program News)," QST, May 1984, p. 87.
  • Bernie Glassmeyer, "UoSAT-OSCAR 11 Back In Service (Amateur Satellite Program News)," QST, Jul 1984, p. 77.
  • Harold E. Price and Jeff Ward, "The UO-11 DCE Message Store-and-Forward System," Proceedings of the ARRL 5th Computer Networking Conference, Orlando, FL, March 9th, 1986, pp. 5.109-5.114
  • Robert Diersing, "Processing UoSAT Whole-Orbit Telemetry Data," Proceedings of the 4th Annual AMSAT Space Symposium, Dallas, 1986, ARRL, pp 55-76.
  • Robert Diersing, "Microcomputer Processing of UoSAT-OSCAR 9 Telemetry," The ARRL Satellite Anthology, 1988, 1988, ARRL, pp 46-51.
  • Jon Bloom, "A Profile of the UoSAT-OSCAR 11 Satellite," The ARRL Satellite Anthology, ARRL, 1988, pp 52-53.
  • Martin Davidoff, The Satellite Experimenter's Handbook, 2nd edition, The American Radio Relay League, Newington, CT., 1990.
  • John A. Magliacane, " Spotlight On: UoSAT-OSCAR-11," The AMSAT Journal, Vol. 16, No. 2, Jan/Feb 1992, p. 17.

Last update May 31, 2003 - N7HPR

  Copyright©The Radio Amateur Satellite Corporation 2004 ,2014 - All Rights Reserved
  Report a bug on this page