Hispasat 1A

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Hispasat 1A
Mission typeCommunications satellite
Operator Hispasat
COSPAR ID 1992-060A OOjs UI icon edit-ltr-progressive.svg
SATCAT no. 22116
Mission duration10 years
Spacecraft properties
Bus Eurostar E2000
Manufacturer Matra Marconi Space
Launch mass2,194 kg
BOL mass 1,325 kg
Dry mass1,100 kg
Payload mass280 kg
Dimensions1.7 x 1.9 x 2.1 m (22.02 m solar array span)
Power3,790 W
Start of mission
Launch dateSeptember 10, 1992
RocketAriane 44LP
Launch site Guiana Space Centre
Contractor Arianespace
End of mission
Disposalgraveyard orbit
Orbital parameters
Semi-major axis 42,433 km
Periapsis altitude 36,055.2 km
Apoapsis altitude 36,070.7 km
Inclination 13.2 °
Period 1,449.9 minutes
Payload
(12+6) Ku-band (8-55 W, 4-110 W) transponders, (3+1) X-band (110 W) transponders
 

The Hispasat 1A was the first communications satellite operated by the Spanish company Hispasat. [1] The satellite covered communications over the Atlantic Ocean for both civilian and military customers. [2] [3] Together with the later Hispasat 1B it formed the first European constellation operating over the New World. [4] Its service life ended in 2003. [5]

Contents

Body

An Ariane 44LP rocket. Ariane 44LP clone at Space Center Bremen.jpg
An Ariane 44LP rocket.

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). [6] [7] It had a RCS of 7.143 m2. [8]

The satellite weighed 2,194 kg at launch and had a dry weight of 1,325 kg. It was 3 axis stabilized. [9]

Propulsion

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. [10] [11]

Additionally, the satellite carried 12 bypropellant (N2O4-MMH) engines with 10 N of thrust each for attitude control and auxiliary maneuvers. [12]

Electrical Power Subsystem

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.

Communications module

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. [13]

For the civilian market, it had twelve Ku-band (8 at 55 W, 4 at 110 W) with six spares. They were mostly used for TV coverage. [14] [15]

Antenna Failure

The 18 December 1997 the X-band antenna suffered a catastrophic failure and ceased functioning. This was later attributed to defects during production and made Matra Marconi Space choose Aérospatiale when building Hispasat 1B's antenna. [16]

Launch

The satellite was successfully launched 10 September 1992 at 23:04 hours by Arianespace [17] on board an Ariane-44LP from the Guiana Space Center along with the American satellite SATCOM C3. [18] [19] [20]

Its orbit was geostationary (GEO) [21] 30º West, around 36,000 km high (36,055.2 km of perigee and 36,070.7 km of apogee) with 13.2º of inclination, a period of 1,449.9 minutes and a semi-major axis of 42,433 km. [22] The 3 September 2001 the satellite was relocated to 29.99º W with an orbital decay of 0.013º W per day. [23]

During its service life it was monitored from Hispasat's headquarters in Arganda del Rey and Rio de Janeiro. [24] Its operating life officially ended in July 2003 when the satellite was definitely moved to a graveyard orbit 7º W and since then it has been drifting 3.458º a day. [25] [26]

Service life

During its 10 year service life, the Hispasat 1A accomplished a series of milestones for the aerospace industry of Spain such as: [27] [28] [29] [30]

See also

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References

  1. ↑ RTVE.es (2018-06-26). "Hispasat 1A, primer satélite español de comunicación". RTVE.es (in Spanish). Retrieved 2022-08-22.
  2. ↑ Agudo, Luis Sepúlveda (2003). "Hispasat en el siglo XXI". Antena de telecomunicación (151): 17–23. ISSN   2481-6345.
  3. ↑ "Hispasat 1A/1B at 30.0°W - LyngSat". www.angelfire.com. Retrieved 2021-10-26.
  4. ↑ Sacristán - Romero, F. (2007). "Structure of the Spanish system of satellite of communications". Journal of Applied Research and Technology. 5 (1): 58–60. ISSN   1665-6423.
  5. ↑ "NASA - NSSDCA - Spacecraft - Details". nssdc.gsfc.nasa.gov. Retrieved 2022-08-18.
  6. ↑ "Hispasat 1A, 1B". Gunter's Space Page. Retrieved 2022-08-17.
  7. ↑ Brunel, O.; Krebs, J. P. (1993-01-01). "Flight results of a new GEO infrared Earth sensor STD 15 on board TC2". NASA STI/Recon Technical Report A. 95: 1069–1083. Bibcode:1993STIA...9585791B. ISSN   0065-3438.
  8. ↑ "TSE - Hispasat 1A, 1B's specifications". www.tbs-satellite.com. Retrieved 2022-08-19.
  9. ↑ Gaullier, F.; Limouzin, G. (1994-01-01). "The EUROSTAR operational concept". Revista Brasileira de Ciencias Mecanicas. 16: 405–411. Bibcode:1994RBrCM..16..405G. ISSN   0100-7386.
  10. ↑ "Hispasat 1A / 1992 - 060A". www.space-propulsion.com. Retrieved 2022-08-18.
  11. ↑ Balduccini, Mauro; Giommi, Marco; Morelli, Guido (1991-07-01). "Flight Firing Operations on the ITALSAT F1 R-4D-11 Thruster". SAE Technical Paper Series. Vol. 1. Warrendale, PA. doi:10.4271/911413.{{cite book}}: CS1 maint: location missing publisher (link)
  12. ↑ "Hispasat 1A / 1992 - 060A". www.space-propulsion.com. Retrieved 2022-08-17.
  13. ↑ "TSE - Hispasat 1A". www.tbs-satellite.com. Retrieved 2022-08-17.
  14. ↑ "Hispasat-series (and other Spanish communications satellites)". rammb.cira.colostate.edu. Retrieved 2021-10-26.
  15. ↑ "Hispasat 1A/1B at 30.0°W - LyngSat". www.angelfire.com. Retrieved 2022-08-17.
  16. ↑ "Spain and Satellite Communication Systems". www.globalsecurity.org. Retrieved 2022-08-22.
  17. ↑ "HISPASAT chooses Arianespace to launch its Amazonas 4A and AG1 satellites". Arianespace. Retrieved 2022-08-17.
  18. ↑ "Ariane Flight: HISPASAT 1A & SATCOM C3". Arianespace. Retrieved 2022-08-17.
  19. ↑ "Satcom 1R, 2R, 5, C1, C3, C4, C5 (Aurora 1, 2)". Gunter's Space Page. Retrieved 2022-08-18.
  20. ↑ Nuestro satélite, Hispasat 1A, cumple 29 AÑOS , retrieved 2022-08-17
  21. ↑ Jehn, R.; Agapov, V.; Hernández, C. (2005-01-01). "The situation in the geostationary ring". Advances in Space Research. Space Debris. 35 (7): 1318–1327. Bibcode:2005AdSpR..35.1318J. doi:10.1016/j.asr.2005.03.022. ISSN   0273-1177.
  22. ↑ "Technical details for satellite HISPASAT 1A". N2YO.com - Real Time Satellite Tracking and Predictions. Retrieved 2022-08-17.
  23. ↑ "Hispasat". www.astronautix.com. Retrieved 2022-08-17.
  24. ↑ ""Indra expands Hispasat ground segment by 5 million euros"" (PDF). Indra prensa. 2016. p. 1.
  25. ↑ "HISPASAT 1A - NORAD 22116 - 3D Online Satellite Tracking". www.satflare.com. Retrieved 2022-08-17.
  26. ↑ "Hispasat 1A - Orbit". www.heavens-above.com. Retrieved 2022-08-22.
  27. ↑ Seseña, Dr Julián; Tardón, Pedro Pintó (2006), "HISPASAT Satellites Programs- Background, Beginning,Experience and Benefits for Society and Spanish Space Industry", 57th International Astronautical Congress, American Institute of Aeronautics and Astronautics, doi:10.2514/6.iac-06-e4.4.08, ISBN   978-1-62410-042-0 , retrieved 2022-08-22
  28. ↑ "El primer satélite Hispasat (1A y 1B) | Revista CAOS". www.revistacaos.es. Retrieved 2022-08-22.
  29. ↑ Barrasa, Gabriel (1992). "Hispasat, un reto cumplido". Política científica (34): 55–57. ISSN   1133-0554.
  30. ↑ Meso Ayerdi, Koldobika (2002). "Origen y desarrollo del satélite en España: la realidad del sistema Hispasat". ISSN   1137-1102.{{cite journal}}: Cite journal requires |journal= (help)
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