HIspasat 1B
Mission typeCommunications satellite
COSPAR ID1993-048A Edit this at Wikidata
SATCAT no.22723
Mission duration10 years
Spacecraft properties
BusEurostar E2000
ManufacturerMatra Marconi Space
Launch mass2,194 kg
BOL mass1,325 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 date22/07/1993
RocketAriane-44L H10+
Launch siteGuiana Space Centre
End of mission
Disposalgraveyard orbit
Orbital parameters
Semi-major axis42,320 km
Altitude35,800 km
Periapsis altitude35,945.6 km
Apoapsis altitude35,953.1 km
Inclination30º W
Period24.07 hours
(12+6) Ku-band (8-55 W, 4-110 W) transponders, (3+1) X-band transponders

The Hispasat 1B was a Spanish communications satellite operated by Hispasat. Along with the Hispasat 1A, the satellite covered communications over the American Continent for both civilian and military customers.[1][2] Together they formed the first European constellation operating over the New World.[3] It's service life ended in 2003.[4]


Ariane 4 rocket.
Ariane 4 rocket.

Similarly to the Hispasat 1A, the body of the Hispasat 1B 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 Matra Marconi Space (now part of Airbus Defence and Space).[5]

The satellite weighted 2,194 kg at launch and had a dry weight of 1,100 kg. It was 3 axis stabilized.[6]


The satellite was propulsed by a R-4D-11 hypergolic engine (originally developed by Marquardt Corporation for its use in the Apollo program). It was provided by Aerojet Rocketdyne and was capable of developing 490 N of thrust in vacuum. It weighted 3.76 kg.[7][8]

Communications module

The satellite offered both civilian and military communication channels for its customers. It's main module consisted in 15 active transponders: three X-band (compatible with NATO Standards) with one spare, for its military customers, and 12 Ku-band (8 at 55 W, 4 at 110 W) with six spares, for the civilian market.[9]

The module was divided between the upper, containing the high gain antenna and lower (containing a set of low gain antennas) faces of the prism.


The satellite was successfully launched the 22nd of July 1993 on board an Ariane-44L H10+ from the Guiana Space Center along with the Indian satellite INSAT-2B.[10][11]

Its orbit is geostationary (GEO) 30º West, around 35,800 km high (35,945.6 km of perigee and 35,953.1 km of apogee) with 12.4º of inclination, a period of 1,444.1 minutes a RCS of 7.9621 m2 and a semi-major axis of 42,320 km.[12]

During its service life it was monitored from Hispasat's headquarters in Madrid. Its operating life officially ended on 2003 although some of its transponders remained active until the 6th of June 2006 when the satellite was definitely moved to a graveyard orbit.[13]

See also


  1. ^ Agudo, Luis Sepúlveda (2003). "Hispasat en el siglo XXI". Antena de telecomunicación (151): 17–23. ISSN 2481-6345.
  2. ^ "Hispasat 1A/1B at 30.0°W - LyngSat". www.angelfire.com. Retrieved 2021-10-26.
  3. ^ 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.
  4. ^ "NASA - NSSDCA - Spacecraft - Details". nssdc.gsfc.nasa.gov. Retrieved 2021-10-25.
  5. ^ "Hispasat 1A, 1B". Gunter's Space Page. Retrieved 2021-10-25.
  6. ^ 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.
  7. ^ "Hispasat 1B / 1993 - 048A". www.space-propulsion.com. Retrieved 2021-10-26.
  8. ^ 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.
  9. ^ "Hispasat-series (and other Spanish communications satellites)". rammb.cira.colostate.edu. Retrieved 2021-10-26.
  10. ^ Jones, Caleb. "Ariane 44L | Hispasat 1B & Insat 2B". Space Launch Now. Retrieved 2021-10-26.
  11. ^ "NASA - NSSDCA - Spacecraft - Telemetry Details". nssdc.gsfc.nasa.gov. Retrieved 2022-01-24.
  12. ^ "Technical details for satellite HISPASAT 1B". N2YO.com - Real Time Satellite Tracking and Predictions. Retrieved 2021-10-25.
  13. ^ "TSE - Hispasat 1B". www.tbs-satellite.com. Retrieved 2021-10-25.