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Hispasat 1A
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Hispasat 1A
The Hispasat 1A was the first communications satellite operated by the Spanish company Hispasat. The satellite covered communications over the Atlantic Ocean for both civilian and military customers. Together with the later Hispasat 1B it formed the first European constellation operating over the New World. Its service life ended in 2003.
The body of the Hispasat 1A was based on the Eurostar E2000 bus. It consisted on a box shaped metal casing (1.7 x 1.9 x 2.21 meters) with retractable solar panels on the lateral faces (when extended measured 22.02 m) and space for the communications module on the upper and lower faces. It was built by British Aerospace and Matra Marconi Space (now part of Airbus Defence and Space). It had a RCS of 7.143 m2.
The satellite weighed 2,194 kg at launch and had a dry weight of 1,325 kg. It was 3 axis stabilized.
Its main engine was a R-4D-11 (originally developed for use in the Apollo program by Marquardt Corporation). This unit was manufactured by Aerojet Rocketdyne and was capable of developing 490 N of thrust in vacuum. It weighed 3.76 kg.
Additionally, the satellite carried 12 bypropellant (N2O4-MMH) engines with 10 N of thrust each for attitude control and auxiliary maneuvers.
The satellite had 3,790 W of electric power. Its voltage was 42,5 V. it had solar panels and batteries especially design to provide power twice a year, when the satellite was deprived of sunlight for 80 minutes due to solar eclipses.
The satellite offered both military and civilian communication channels for its customers. The module consisted in 15 active transponders divided between the upper, containing the high gain circularly polarized L antenna and lower (containing a set of low gain antennas) faces of the prism. As a whole, it weighed 280 kg.
For governments and the military it offered three X-band of 110 W each and TWTA amplified (compatible with NATO Standards) with one spare. The bandwidth was 27 MHz and it had a maximum effective isotropic radiated power of 58 dB. In addition its uplink speeds were 12.1-12.5 GHz and 17.3-17.7 GHz downlink.
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Hispasat 1A
The Hispasat 1A was the first communications satellite operated by the Spanish company Hispasat. The satellite covered communications over the Atlantic Ocean for both civilian and military customers. Together with the later Hispasat 1B it formed the first European constellation operating over the New World. Its service life ended in 2003.
The body of the Hispasat 1A was based on the Eurostar E2000 bus. It consisted on a box shaped metal casing (1.7 x 1.9 x 2.21 meters) with retractable solar panels on the lateral faces (when extended measured 22.02 m) and space for the communications module on the upper and lower faces. It was built by British Aerospace and Matra Marconi Space (now part of Airbus Defence and Space). It had a RCS of 7.143 m2.
The satellite weighed 2,194 kg at launch and had a dry weight of 1,325 kg. It was 3 axis stabilized.
Its main engine was a R-4D-11 (originally developed for use in the Apollo program by Marquardt Corporation). This unit was manufactured by Aerojet Rocketdyne and was capable of developing 490 N of thrust in vacuum. It weighed 3.76 kg.
Additionally, the satellite carried 12 bypropellant (N2O4-MMH) engines with 10 N of thrust each for attitude control and auxiliary maneuvers.
The satellite had 3,790 W of electric power. Its voltage was 42,5 V. it had solar panels and batteries especially design to provide power twice a year, when the satellite was deprived of sunlight for 80 minutes due to solar eclipses.
The satellite offered both military and civilian communication channels for its customers. The module consisted in 15 active transponders divided between the upper, containing the high gain circularly polarized L antenna and lower (containing a set of low gain antennas) faces of the prism. As a whole, it weighed 280 kg.
For governments and the military it offered three X-band of 110 W each and TWTA amplified (compatible with NATO Standards) with one spare. The bandwidth was 27 MHz and it had a maximum effective isotropic radiated power of 58 dB. In addition its uplink speeds were 12.1-12.5 GHz and 17.3-17.7 GHz downlink.