Sirius 3 is a high-power HS 376 satellite built for Nordiska Satellitaktiebolaget (NSAB) of Sweden. The satellite will provide direct-to-home television services to the Scandinavian region.

Sirius 3 carries 15 Ku-band transponders powered by 44-watt traveling wave-tube amplifiers. The spacecraft will use gallium arsenide solar cells to generate a minimum of 1400 watts of spacecraft power at end of life, and will rely on nickel-hydrogen batteries for power through eclipse periods.

Sirius 3 is the first satellite Hughes has sold directly to a Swedish customer, but it is not the first Hughes-built satellite in NSAB's fleet. In 1993, NSAB acquired Marcopolo I, an HS 376 satellite launched in 1989 for British Satellite Broadcasting Ltd. NSAB renamed Marcopolo I to Sirius 1, and it operates from 5 degrees East longitude.

Sirius 3 is designed to be co-located at 5 degrees East but may be operated from other geostationary longitudes as well.

Swedish Space Corporation

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