Astra 3B


Astra 3B
COSPAR ID2010-021A
SATCAT no.36581
Mission duration15 years
Spacecraft properties
(now Airbus Defence and Space)
Launch mass5,472 kilograms (12,064 lb)
Power10 kW
Start of mission
Launch dateMay 21, 2010 (2010-05-21)
RocketAriane 5ECA V194
Launch siteKourou ELA-3
Orbital parameters
Reference systemGeocentric
Longitude23.5° East
SlotAstra 23.5°E
Perigee altitude35,785 kilometres (22,236 mi)[1]
Apogee altitude35,798 kilometres (22,244 mi)[1]
Inclination0.07 degrees[1]
Period1436.07 minutes[1]
EpochJanuary 23, 2015, 04:48:48 UTC[1]
Band52 Ku band
4 Ka band
Bandwidth33/36 megahertz
TWTA power140 watts
EIRP52 decibel-watts

Astra 3B is one of the Astra communications satellites owned and operated by SES, launched in 2010 to the Astra 23.5°E orbital slot providing digital television and radio for direct-to-home (DTH), and the AstraConnect two-way satellite broadband services across Europe and the Middle East.

The satellite is also used to provide the one-way Othernet internet access service to Europe that, using small lightweight receiver stations, is designed to eventually provide news, weather, educational and other media to communities with no other access to the internet.[2]

Astra 3B was used by SES to broadcast its first demonstration 8K television signal in May 2018.[3]


The satellite provides three broadcast beams, of horizontal and vertical polarisation that cover three areas of the Earth's surface. The Pan-European Wide beam provides DTH reception on 60 cm dishes across Europe from Spain to the Black Sea and from Greece to Scandinavia. The European spot beam (for central and eastern Europe) and the Middle East spot beam (the Arabian Peninsula, Iran and Iraq) provide for contribution and distribution services, and data and IP trunking services between the two regions with Ka band uplink and downlink used in Europe and Ku band in the Middle East.[4]

Astra 3B was finally launched in May 2010[5] after nearly two months delay caused by technical problems to the main stage pressurization system of the Ariane 5 rocket, including two on-the-launch-pad postponements on March 24, 2010 and April 9.[6]

Astra 3B became commercially operational in June 2010 to initially provide DTH broadcast services mainly to the Benelux region and Eastern Europe as well as the two-way broadband service, ASTRA2Connect across Europe and the Middle East. In January 2011 Astra announced that Bulgarian DTH operator Satellite BG would launch a package of more than 60 standard definition channels and 12 high definition channels, including sports, film, factual and children's TV, and all major Bulgarian public and commercial services on February 1, using three transponders on Astra 3B to reach TV homes across Bulgaria.[7]

The deployment of Astra 3B helped to optimize the spectrum use at 23.5° east and enabled SES to release the Astra 1E and Astra 1G satellites previously at Astra 23.5°E for use at other orbital positions.[8]

See also


  1. ^ a b c d e "ASTRA 3B Satellite details 2010-021A NORAD 36581". N2YO. January 23, 2015. Retrieved January 25, 2015.
  2. ^
  3. ^ "SES Showcases its First Broadcast of 8K Television" (Press release). SES. May 23, 2018. Retrieved June 26, 2018.
  4. ^ SES Astra ASTRA 3B Middle East spot beam. (February, 2009). Company factsheet
  5. ^ "ASTRA 3B SATELLITE SUCCESSFULLY LAUNCHED" (Press release). SES ASTRA. May 22, 2010. Retrieved January 26, 2012.
  6. ^ "Quality is focus of Arianespace following Ariane 5's launch postponement" (Press release). Arianespace. April 14, 2010. Retrieved January 26, 2012.
  7. ^ "SES ASTRA Expands in Central and Eastern Europe and Enters the Bulgarian Market" (Press release). SES ASTRA. January 17, 2011.
  8. ^ "ASTRA 3B SATELLITE NOW OPERATIONAL" (Press release). SES ASTRA. June 16, 2010. Retrieved January 26, 2012.

External links

  • Official Astra consumers/viewers' website
  • SES guide to channels broadcasting on Astra satellites
  • Astra 3B coverage maps as files.
  • Astra 3B coverage maps on Google Maps.
  • Astra 3B real time tracking.