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Soyuz launch completes first-generation O3b constellation - SpaceNews.com Apr 2019
"European launch provider Arianespace completed SES’s first-generation O3b constellation April 4 [2019] with the Soyuz launch of four satellites."

"SES now has 20 O3b satellites in medium Earth orbit. Franco-Italian manufacturer Thales Alenia Space built the Ka-band satellites, each of which carries 20 gigabits per second of throughput. "

"John-Paul Hemingway, SES Networks CEO, stood by SES’s decision to focus on medium Earth orbit, arguing that low Earth orbit systems will face latency challenges similar to GEO satellites because their closer proximity to the Earth means smaller coverage areas, necessitating routing traffic through multiple stops for long-distance communications. "
SpaceNews  O3b  space  launch  Soyuz  SES  MEO 
april 2019 by pierredv

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