OSCAR-11 / UoSAT-2 Celebrates 30 Years in Orbit

UOSAT-2 / OSCAR-11 with Dave Brock UoS kneeling, Christine Sweeting G6APF and Neville Bean G8NOB

UoSAT-2 / OSCAR-11 with Dave Brock UoS kneeling, Christine Sweeting G6APF and Neville Bean G8NOB

UoSAT-OSCAR-11 has now been in orbit for 30 years and remarkably its signal on 145.826 MHz FM (AFSK 1200 bps ASCII) is still being received.

UOSAT-2 / OSCAR-11 1984 Martin Sweeting G3YJO and Dave Bocks UoS standing

UoSAT-2 / OSCAR-11 Martin Sweeting G3YJO and Dave Bocks UoS standing

UoSAT-2, also known as UoSAT-OSCAR-11 or UO-11, was the second satellite designed and built by a team of engineers at the University of Surrey in Guildford, Surrey, UK and was the successor to UoSAT-1 / UoSAT-OSCAR-9 (see Hobby Electronics August 1981). It was launched from the Western Test Range at Vandenberg Air Base, in Lompoc, California along with LANDSAT-5 on a Delta 3920 rocket on March 1, 1984.

UO-11 was the most rapidly designed OSCAR, going from inception to launch in only five months. It was also the first amateur satellite to carry a digital communications package into Earth orbit, and the first to be controlled by a CPU running software written in the high-level programming language “Forth”.

UOSAT-2_OSCAR- 11UO-11 carries beacons in three amateur radio bands.

The 145.826 MHz beacon transmits FM Audio Frequency Shift Keying (AFSK) 1200 bps ASCII data. It the early years it also transmitted a voice message from the digitalker experiment.

The 435.025 MHz beacon transmitted either 1200 bps FM AFSK or 4800 bps PSK data. This beacon was used to downlink information from the Digital Store and Readout (DSR) Experiment, which includes CCD Earth image data, results from the Particle Wave Experiment, and engineering data from the RCA COSMAC 1802 CPU.

The 2401.5 MHz beacon transmitted FM and PSK signals. Antenna polarization for all three beacon transmitters is left-hand circular (LHCP). Only the 145.826 MHz beacon is now operational.

Read Usenet messages from 1984 about UoSAT-B / UoSAT-2

Martin Sweeting G3YJO listening to the UO-11 Digitalker

Martin Sweeting G3YJO listening to the UO-11 Digitalker

Information compiled by Clive Wallis G3CWV
https://web.archive.org/web/20150413193503/http://g3cwv.co.uk/oscar11.htm

UO-11 page on the DK3WN satellite blog at http://www.dk3wn.info/p/?cat=47

SSTL Blog – Happy 30th Birthday to UoSAT-2
http://www.sstl.co.uk/Blog/March-2014/Happy-30th-Birthday-to-UoSAT-2-

OSCAR-9 and OSCAR-11 TV News Reports
https://amsat-uk.org/2011/10/30/oscar-9-and-oscar-11-tv-news-reports/

BBC Micro ASTRID UoSAT receiver and AMSAT-UK Software Library
https://amsat-uk.org/2011/12/11/bbc-micro-and-amsat-uk-software-library/

UOSAT_OSCAR-11

Amateur radio satellite OSCAR-11 still transmitting after 29 years in orbit

UOSAT-2 / OSCAR-11 with Dave Brock UoS kneeling, Christine Sweeting G6APF and Neville Bean G8NOB

UoSAT-2 / OSCAR-11 with Dave Brock UoS kneeling, Christine Sweeting G6APF and Neville Bean G8NOB

Mike Rupprecht DK3WN reports receiving a good signal from the amateur radio microsatellite UoSAT-OSCAR-11 on 145.826 MHz FM (AFSK 1200 bps ASCII), see his blog at http://www.dk3wn.info/p/?p=33395

UOSAT-2 / OSCAR-11 1984 Martin Sweeting G3YJO and Dave Bocks UoS standing

UoSAT-2 / OSCAR-11 Martin Sweeting G3YJO and Dave Bocks UoS standing

UoSAT-2, also known as UoSAT-OSCAR-11 or UO-11, was the second satellite designed and built by a team of engineers at the University of Surrey in Guildford, Surrey, UK and was the successor to UoSAT-1 / UoSAT-OSCAR-9 (see Hobby Electronics August 1981). It was launched from the Western Test Range at Vandenberg Air Base, in Lompoc, California along with LANDSAT-5 on a Delta 3920 rocket on March 1, 1984.

OSCAR-11 was the most rapidly designed OSCAR, going from inception to launch in only five months. It was also the first amateur satellite to carry a digital communications package into Earth orbit, and the first to be controlled by a CPU running software written in the high-level programming language “Forth”.

UOSAT-2_OSCAR- 11OSCAR-11 carries beacons in three amateur radio bands.

The 145.826 MHz beacon transmits FM Audio Frequency Shift Keying (AFSK) 1200 bps ASCII data. It the early years it also transmitted a voice message from the digitalker experiment.

The 435.025 MHz beacon transmitted either 1200 bps FM AFSK or 4800 bps PSK data. This beacon was used to downlink information from the Digital Store and Readout (DSR) Experiment, which includes CCD Earth image data, results from the Particle Wave Experiment, and engineering data from the RCA COSMAC 1802 CPU.

The 2401.5 MHz beacon transmitted FM and PSK signals. Antenna polarization for all three beacon transmitters is left-hand circular (LHCP). Only the 145.826 MHz beacon is now operational.

Addition OSCAR-11 information http://www.g3cwv.co.uk/oscar11.htm

OSCAR-9 and OSCAR-11 TV News Reports
https://amsat-uk.org/2011/10/30/oscar-9-and-oscar-11-tv-news-reports/

BBC Micro ASTRID UoSAT receiver and AMSAT-UK Software Library
https://amsat-uk.org/2011/12/11/bbc-micro-and-amsat-uk-software-library/

UOSAT_OSCAR-11