Astra 1E

Astra 1E
SATCAT № 23686
Mission duration 14 years
Spacecraft properties
Bus HS-601
Manufacturer Boeing Satellite Systems
Launch mass 3,014 kilograms (6,645 lb)
Power 4,150 watts
Start of mission
Launch date October 19, 1995 (1995-10-19)
Rocket Ariane 42L V79
Launch site Kourou ELA-2
Contractor Arianespace
Orbital parameters
Reference system Geocentric
Regime Geosynchronous
Perigee 35,778 kilometres (22,231 mi)[1]
Apogee 35,806 kilometres (22,249 mi)[1]
Inclination 3.81 degrees[1]
Period 1436.08 minutes[1]
Epoch 23 January 2015, 22:12:37 UTC[1]
Transponders
Band 18 Ku band
Bandwidth (FSS) 26 megahertz
(BSS) 33 megahertz
EIRP 51 decibel-watts

Astra 1E is one of the Astra communications satellites in geostationary orbit owned and operated by SES. It was launched in 1995 to the Astra 19.2°E orbital slot initially to provide digital television and radio for DTH across Europe.

Astra 1E was the first Astra satellite to be dedicated to digital TV broadcasting and it carried many of the first digital TV channels from networks broadcasting to France, Germany, and other European countries in the 1990s.

The satellite originally provided two broadcast beams, of horizontal and vertical polarisation, for FSS (10.70-10.95 GHz) and for BSS (11.70-12.10 GHz) frequency bands. The FSS beams provide footprints that cover essentially the same area of Europe – northern, central and eastern Europe, including Spain and northern Italy – while the BSS horizontal beam excludes Spain and extends further east, and the BSS vertical beam includes Spain and more of southern Italy but does not extend so far east.[2] Within the footprints, TV signals are usually received with a 60–80 cm dish.

In October 2007, following the successful deployment of Astra 1L at 19.2°E, Astra 1E was moved to Astra’s new DTH orbital position, 23.5°E[3] where it provided capacity for the transmission of new services including the ASTRA2Connect two-way satellite broadband Internet service which provides high speed internet access and VOIP without landline connection at up to 2 Mbit/s download speeds and 128 kbit/s upload[4] using four Ku band transponders for both forward and return paths from the user’s remote terminal.[5]

In May 2010 Astra 3B was launched to the 23.5° east position, coming into service in June 2010, at which time the services using Astra 1E were transferred to the new craft. In August 2010, Astra 1E left the 23.5° east position moving westwards, to the Astra 5°E position to provide backup for Astra 4A pending the launch of Astra 4B to that position in 2011. At 5° east, Astra 1E carried very little TV traffic.[6] Following the launch of Astra 4B (renamed to SES-4) in February 2012,[7] Astra 1E was moved to 108.2°E, in inclined orbit and with no traffic, and then to 31.5°E in Summer 2013. It returned to 23.5°E in February 2015[8] and started moving 5.4° west per day in June 2015, reaching 2°E at the end of 2015[9]

See also

References

  1. 1 2 3 4 5 "ASTRA 1E Satellite details 1995-055A NORAD 23686". N2YO. 23 January 2015. Retrieved 25 January 2015.
  2. ↑ "Astra 1E". SES ASTRA. Archived from the original on 23 September 2008. Retrieved September 19, 2008.
  3. ↑ "23.5° East is a new orbital slot for Direct to Home and ASTRA2Connect / ASTRA 1E replaces ASTRA 1D" (Press release). SES ASTRA. October 23, 2007. Retrieved January 26, 2012.
  4. ↑ SES ASTRA “ASTRA2Connect Broadband and VoIP” (August, 2008). Company factsheet
  5. ↑ "Astra 1E at 23.5°E". LyngSat. Archived from the original on 12 September 2008. Retrieved September 19, 2008.
  6. ↑ "Astra 1E at 4.6°E". LyngSat. Archived from the original on 25 August 2010. Retrieved October 4, 2010.
  7. ↑ "SES-4 SATELLITE NOW OPERATIONAL" (Press release). SES ASTRA. April 18, 2012. Retrieved February 15, 2013.
  8. ↑ Real Time Satellite Tracking And Predictions Accessed February 27, 2015
  9. ↑ Real Time Satellite Tracking And Predictions Accessed December 31, 2015.

External links

This article is issued from Wikipedia - version of the Tuesday, February 02, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.