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Detailed information about SIRIUS 3 satellite

Designator id: 1998-056B

Description of SIRIUS 3 Satellite:

Sirius 3 is a Swedish geosynchronous communications spacecraft. The spacecraft will provide voice and video communications to Northern Europe and Scandinavia through 15 Ku-band 44 watt transponders after parking at about 5 degrees E longitude.

The satellite is cylindrical in shape, 2.16 m in diameter and 7.76 m in height when deployed. It has two telescoping cylindrical solar panels and antennas that fold for compactness during launch. The Sirius 3 antenna has shaped surface octagonal reflectors, approximately 2 m in diameter, with single offset feeds. This antenna has three surfaces: one for horizontally polarized signals, one for vertically polarized signals, and one for on-station tracking and command.

Sirius 3 carries 15 Ku-band transponders powered by 44 watt traveling-wave tube amplifiers (TWTAs). The spacecraft uses gallium arsenide solar cells to generate a minimum of 1400 watts of spacecraft power at end of life and relies on nickel-hydrogen batteries for power through eclipses. The planned service life is 12 years.

Sirius 3 is used primarily for direct-to-home and cable television services as well as data distribution in Scandinavia and neighboring countries, but is also capable of providing television distribution and high-speed internet data to Greenland. The Ku-band effective isotropic radiated power (EIRP) will be minimum 54 dBW in the primary zone.


Technical data:

Launch Date: 1998-10-05
Launch Vehicle: Ariane 44L
Launch Site: Kourou, French Guiana
Mass: 815.0 kg
Nominal Power: 1400.0 W
Funding Agencies:

Nordic Satellite Company (Sweden)

Disciplines:

Communications

Source: Nasa

Two Line Element Set (TLE):
1 25492U 98056B   12339.88258819  .00000117  00000-0  10000-3 0  1879
2 25492 003.3933 068.0589 0001245 190.1065 184.8948 01.00275229 51988

Last TLE update on :2012-12-07

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