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United Launch Alliance
Atlas V 531 | SES-20 & SES-21
Recorded mission coverage
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Mission brief
The flight at a glance.
SES-20 & SES-21 are a pair of C-band communication satellites built by Boeing, using the highly efficient all-electric propulsion BSS-702SP satellite bus. These satellites will enable SES to clear 280MHz of mid-band spectrum for 5G use while seamlessly migrating SES’s existing C-band customers and ensuring the continued delivery of digital television to nearly 120 million American TV homes and other critical data services.
Open the full mission →Published flight sequence
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Planned timings relative to the target. These steps do not indicate live progress.
A flight sequence has not been published for this mission.