Astra 1N


Astra 1N
COSPAR ID2011-041A
SATCAT no.37775
Mission duration15 years
Spacecraft properties
BusEurostar E3000
(now Airbus Defence and Space)
Launch mass5,300 kilograms (11,700 lb)
Power13,074 watts
Start of mission
Launch dateAugust 6, 2011 (2011-08-06)
RocketAriane 5 ECA VA203
Launch siteKourou ELA-3
Orbital parameters
Reference systemGeocentric
SlotAstra 19.2°E
Perigee altitude35,785 kilometres (22,236 mi)[1]
Apogee altitude35,800 kilometres (22,200 mi)[1]
Inclination0.04 degrees[1]
Period1436.09 minutes[1]
Epoch24 January 2015, 23:20:03 UTC[1]
Band104 Ku band
Bandwidth26/33 megahertz
EIRP54 decibel-watts

Astra 1N is one of the Astra communications satellites owned and operated by SES and is positioned at the Astra 19.2°E orbital slot. It was launched in 2011 and is the fourth satellite to be built for Astra by Astrium (now Airbus Defence and Space) and the 46th SES satellite in orbit, and entered commercial service at 28.2°E on 24 October 2011.[2]


The satellite was originally designed to provide digital television and radio broadcast services across Europe from the Astra 19.2°E position, in particular the German, French and Spanish markets, alongside the Astra 1KR, Astra 1L, and Astra 1M satellites already operating there.[3] At launch, Astra 1N was instead temporarily positioned at 28.2°E to replace Astra 2D and provide capacity for the UK and Ireland, including the Sky and Freesat DTH platforms, prior to the launch of Astra 2E and Astra 2F to this position in 2013 and 2012, respectively.[4] All traffic on Astra 2D was transferred to Astra 1N in early 2012 (as of February 2014, Astra 2D remains at 28.2°E but is inactive).[5]

On September 28, 2012 Astra 2F was successfully launched from Kourou in French Guiana.[6] After in-orbit testing at 43.5°E,[7] the satellite began commercial operations at 28.2°E on November 21, 2012.[8] and some services were transferred from Astra 1N to Astra 2F. Astra 2E was launched to the Astra 28.2°E position from Baikonur in Kazakhstan on September 30, 2013 [9] following a 10-week delay caused by the catastrophic failure of a previous launch.[10] After in-orbit testing at 43.5°E[11] it began commercial operations at 28.2°E in February 2014.[12] and the remaining channels on Astra 1N were transferred to Astra 2E.[13] Astra 1N was then relocated to its design position at 19.2°E.[14]

Broadcasting footprint

The Astra 1N satellite provides three broadcast beams, each with horizontal and vertical polarisation, across three footprints. The UK spot beam covers the UK and Ireland with reception on dishes of 45 cm diameter across the whole of the UK, Ireland and Channel Islands with the exception of the extreme north east of Scotland, where a 60 cm dish is required.

The Pan-European Beam 1 provides reception on a 60 cm dish across Western and Central Europe including Sardinia in the south but excluding Finland in the North. Pan-European Beam 2 provides 60 cm dish reception over substantially the same area reaching further north into Scandinavia and east as far as the Baltic States, Russia and the Black Sea but excluding more of the Iberian peninsula, Italy and the Mediterranean.[15]

See also


  1. ^ a b c d e "ASTRA 1N Satellite details 2011-041A NORAD 37775". N2YO. 24 January 2015. Retrieved 25 January 2015.
  2. ^ "New SES Satellite ASTRA 1N Operational" (Press release). SES. 24 October 2011. Retrieved January 26, 2012.
  3. ^ "SES ASTRA ORDERS NEW SATELLITE FROM ASTRIUM" (Press release). SES Astra. July 14, 2008. Retrieved January 26, 2012.
  4. ^ "ASTRA 1N ROARS INTO SPACE ON BOARD ARIANE 5" (Press release). SES. August 7, 2011. Retrieved January 26, 2012.
  5. ^ Astra 2D in SES fleet information Archived 2014-02-13 at the Wayback Machine Accessed February 28, 2014
  6. ^ "SES SUCCESSFULLY LAUNCHES ASTRA 2F SATELLITE" (Press release). SES. October 1, 2012. Retrieved December 27, 2012.
  7. ^ Astra 2F Testing Reception Reports,, retrieved December 27, 2012
  8. ^ "SES' ASTRA 2F SATELLITE STARTS OPERATIONS" (Press release). SES. November 21, 2012. Retrieved December 27, 2012.
  9. ^ "ASTRA 2E successfully launched" (Press release). SES. September 30, 2013. Retrieved September 30, 2013.
  10. ^ Russia Halts Proton Rocket Launches After Explosive Crash July 2, 2013. Accessed September 30, 2013
  11. ^ "Astra 2E at REAL TIME SATELLITE TRACKING AND PREDICTIONS". Retrieved 30 December 2013.
  12. ^ "SES's ASTRA 2E SATELLITE GOES LIVE at 28.2/28.5 DEGREES EAST OVER EMEA" (Press release). SES. January 31, 2014. Retrieved February 27, 2014.
  13. ^ Changes to BBC satellite transponders in 2013 December 12, 2012 BBC Distribution blog. Accessed July 16, 2013
  14. ^ Real Time Satellite Tracking And Predictions Accessed February 28, 2014
  15. ^ "Astra 1N Factsheet". SES. Retrieved January 26, 2012.

External links

  • Official Astra consumers/viewers' website
  • SES guide to channels broadcasting on Astra satellites
  • Official trade/industry site
  • SES page for Astra 1N