Name: PoSAT-OSCAR 28 (PoSAT-1)
Catalog Number: 22829
Callsign: Broadcast: POSAT1-11 BBS: POSAT1-12
Launched: September 25, 1993
Launch vehicle: Ariane
Launch location: Kourou, French Guiana
Weight: 48.7 kg
Orbit: Circular LEO (Low Earth Orbit), sun synchronous, 822
x 800 km
Inclination: 98.6 degrees
Size: 350 x 350 x 650 mm
Period: 101 Minutes
Digital Transponders Mode JD 9600 baud FSK (FM)
435.075 MHz (Presently in use)
Status: Operational - Not open for Amateur use
Similar to KITSAT-OSCAR-23 in construction.
9600 bps AX.25 protocol store-and-forward PACSAT
Protocol Suite communications system.
CCD Earth Imaging System (EIS)
GPS Navigation Experiment
Cosmic Ray Experiment (CRE)
Digital Signal Processing Experiment (DSPE)
No further information is available.
Launched alongside HealthSat-2
on the September 1993, PoSAT-1 is Portugal's first satellite achieved through
a technology transfer program with Surrey
Satellite Technology, Ltd. (SSTL). PoSAT-1 was built at the University
of Surrey in a collaborative program between a consortium of Portuguese
academia and industry. The Portugese consortium sent 4 engineers
to Surrey to participate in on-the-job training. Like KITSAT-1,
PoSAT-1 carries a wide range of technology experiments, including earth
imaging cameras, DSP and space-radiation experiments. In addition, PoSAT-1
carries the first microsatellite GPS experiment and an ultra-low-cost CCD
star sensor. PoSAT-1 is operated jointly by the University of Surrey command
station at Guildford and the Portugese command station at Sintra.
PoSAT was operated on amateur frequencies for several weeks in early
1994. OSCAR News 105 (February 1994, p. 35) carried a letter from
CT1DBS reporting that an agreement was signed by AMSAT-PO and the PoSAT
Consortium on December 6, 1993 stating "The name of PoSat-1, when in use
by the amateur radio community will be PoSAT OSCAR 28, OSCAR 28 or PO-28."
Presently, PoSAT-1 is not open for amateur operations.
More information is available at the Surrey
Satellite Technology, Ltd.
Steve Ford, "PoSAT-OSCAR 28 Opens to Amateurs," QST, Apr 1994, p.
to Satellite Summary
Last update May 31, 2003 - N7HPR