O3b (satellite)

O3b is a satellite constellation designed for telecommunications and data backhaul from remote locations. O3b stood for "other three billion," or the other three billion people at the time that did not have stable internet access.

O3b
Rendering of O3b satellite coverage areas and visibility around the equator.
OperatorSES Networks
Spacecraft properties
Dry mass700 kg
Start of mission
Launch date25 June 2013 (UTC) (2013-06-25Z) (four)
10 July 2014 (UTC) (2014-07-10Z) (four)
18 December 2014 (UTC) (2014-12-18Z) (four)
9 March 2018 (UTC) (2018-03-09Z) (four)
4 April 2019 (UTC) (2019-04-04Z) (four)
Orbital parameters
Reference systemGeocentric
RegimeMedium Earth
EccentricityCircular
Perigee altitude8063 km
Repeat interval5 daily
Velocity11,755 mph
 

The first four satellites were launched on 25 June 2013,[1] eight more in 2014 (four satellites on 10 July 2014 and four on 18 December 2014), and four more on 9 March 2018.[2] The constellation was extended to twenty satellites in April 2019.[3][4][5]

The constellation was initially built, owned and operated by O3b Networks, which became a wholly owned subsidiary of SES S.A. in 2016[6] and ownership and operation of the constellation passed to SES Networks, a division of SES. The O3b constellation began offering service in March 2014.[7]

Satellites

The first satellites were deployed in a circular orbit along the equator at an altitude of 8063 km (medium Earth orbit) at a velocity of approximately 11,755 mph (18,918 km/h), each making 5 orbits a day.[8] As of 2018, the constellation has sixteen satellites operational in orbit, after four launches of four satellites each. Due to problems with a component of the first four satellites launched, three of those four have been placed on standby for the other three, so thirteen are used operationally.[9]

Each satellite is equipped with twelve fully steerable Ka band antennas (two beams for gateways, ten beams for remotes) that use 4.3 GHz of spectrum (2×216 MHz per beam) with a proposed throughput of 1.6 Gbit/s per beam (800 MBit/s per direction),[10] resulting in a total capacity of 16 Gbit/s per satellite. Each beam's footprint measures 700 km in diameter.[11] O3b claims a mouth-to-ear one-way latency of 179 milliseconds for voice communication, and an end-to-end round-trip latency of 140 ms for data services. The maximum throughput per TCP connection is 2.1 Mbit/s.[12] For maritime applications, O3b claims a round-trip latency of 140 ms, and connectivity speeds of over 500 Mbit/s.[13]

The satellites are powered by gallium arsenide solar arrays and lithium ion batteries[14] and weigh approximately 700 kilograms (1,500 lb) each.[1]

The satellites were constructed by Thales Alenia Space, a division of Thales Group.[15] The first satellite (PFM) was built in the Cannes Mandelieu Space Center, while the rest of the constellation was assembled, integrated and tested in Thales Alenia Space Italy's Roman facilities.

In September 2017, SES announced the next generation of O3b satellites and placed an order for an initial seven from Boeing Satellite Systems using a new satellite platform based on Boeing's 702 line of scalable buses. Expected to launch in 2021, the O3b mPower constellation of MEO satellites for broadband internet services will "be able to deliver anywhere from hundreds of megabits to 10 gigabits to any ship at sea" through 30,000 spot beams. Software-defined routing will direct traffic between the mPower MEO satellites and SES' geostationary fleet.[16]

List of satellites
Name NORAD ID Int'l Code Launch Date Period (min)
O3B FM18 44115 2019-020D April 4, 2019 287.9
O3B FM17 44114 2019-020C April 4, 2019 287.9
O3B FM19 44113 2019-020B April 4, 2019 287.9
O3B FM20 44112 2019-020A April 4, 2019 287.9
O3B FM13 43234 2018-024D March 9, 2018 287.9
O3B FM14 43233 2018-024C March 9, 2018 287.9
O3B FM16 43232 2018-024B March 9, 2018 287.9
O3B FM15 43231 2018-024A March 9, 2018 287.9
O3B FM9 40351 2014-083D December 18, 2014 287.9
O3B FM12 40350 2014-083C December 18, 2014 287.9
O3B FM11 40349 2014-083B December 18, 2014 287.9
O3B FM10 40348 2014-083A December 18, 2014 287.9
O3B FM3 40082 2014-038D July 10, 2014 287.9
O3B FM7 40081 2014-038C July 10, 2014 287.9
O3B FM6 40080 2014-038B July 10, 2014 287.9
O3B FM8 40079 2014-038A July 10, 2014 287.9
O3B PFM 39191 2013-031D June 25, 2013 287.9
O3B FM2 39190 2013-031C June 25, 2013 287.9
O3B FM4 39189 2013-031B June 25, 2013 287.6
O3B FM5 39188 2013-031A June 25, 2013 287.9

[17]

References
  1. "Soyuz Flight VS05 with four O3b networks satellites". Arianespace. 25 June 2013. Retrieved 6 October 2017.
  2. "Successful Launch of Four O3b Satellites Expands Fibre-like Connectivity". SES S.A. 9 March 2018. Retrieved 11 March 2018.
  3. Four New Satellites Ride Into Space To Join Growing SES Constellation Space.com 4 April 2019. Accessed 24 April 2019
  4. "SES takes control of O3b, citing synergies between GEO, MEO constellations". 2016.
  5. Thales readies 4 satellites for O3b Advanced Television. 19 December 2018. Accessed 31 December 2018
  6. SES Completes Acquisition of 100% of O3b Networks Business Wire. August 1, 2016. Accessed April 26, 2017
  7. Wood, Lloyd; Lou, Yuxuan; Olusola, Opeoluwa (2014). "Revisiting elliptical satellite orbits to enhance the O3b constellation". Journal of the British Interplanetary Society. 67 (3): 110–118. arXiv:1407.2521. Bibcode:2014JBIS...67..110W.
  8. "iDirect's Interoperability with O3b's MEO Satellite System". 2008. Archived from the original on 11 August 2014. Retrieved 31 January 2013.
  9. "O3B NETWORKS SATELLITES". Retrieved 13 November 2019.
  10. "O3b Networks Presentation" (PDF). presentation. O3b Networks. 23 February 2009. Retrieved 9 January 2013.
  11. "O3b website – Our technology". website. O3b Networks. Archived from the original on 17 March 2015. Retrieved 9 January 2013.
  12. "Why Latency Matters to Mobile Backhaul" (PDF). O3b Networks and Sofrecom. 18 April 2013. Archived from the original (PDF) on 18 November 2013.
  13. "O3b Maritime" (PDF). O3b Networks. 18 June 2012. Archived from the original (PDF) on 24 October 2012.
  14. "O3b Networks : Space Vehicle". Archived from the original on 19 February 2009.
  15. "O3b Networks : Advantage". Archived from the original on 3 March 2011.
  16. SES building a 10-terabit O3b ‘mPower’ constellation Space News 11 September 2017. Accessed 31 October 2017
  17. "O3B Networks satellites". www.n2yo.com. Retrieved 14 November 2019.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.