|Mission duration||15 years (planned)|
0 days (elapsed)
|Manufacturer||Thales Alenia Space|
|Launch mass||6,000 kg (13,000 lb)|
|Dry mass||5,060 kg (11,160 lb)|
|Start of mission|
|Launch date||August 2021 (planned) |
|Rocket||Ariane 5 ECA (VA255)|
|Launch site||Centre Spatial Guyanais,|
|Reference system||Geocentric orbit|
|Coverage area||North America, South America, Caribbean, Mexico, Atlantic Ocean region|
SES-17, is a high throughput all electric geostationary communications satellite currently under construction and testing for launch in August 2021. Owned and operated by SES S.A., and designed and manufactured by Thales Alenia Space, SES-17 will operate in conjunction with SES's other geostationary satellites and SES's medium Earth orbit O3b MEO and O3b mPOWER satellites to provide connectivity services across the Americas and the Atlantic Ocean region.
SES-17 is based on the three axis stabilised Spacebus NEO satellite bus. It has a mass of more than 6,000 kg (13,000 lb), produces 15 kW of power and has a design life of 15 years. Like all Spacebus NEO, SES-17 will use electric propulsion exclusively for both orbit raising and station keeping and is expected to be launched on an Arianespace Ariane 5 ECA launch vehicle in August 2021.
SES-17 is SES's first geostationary Ka-band high-throughput satellite, and the first one to include a fully digital payload, using Thales' Spaceflex VHTS Processor, a Digital Transparent Processor (DTP) developed with support from the French space agency, CNES and the European Space Agency (ESA)  to provide in-orbit frequency plan flexibility so mobility customers can change their networks in real time in response to changing bandwidth demands, implementing broadcast, multicast or mesh network as required, and improving efficiency in throughput and bandwidth use.
Along with SES's forthcoming medium Earth orbit satellite constellation, O3b mPOWER, SES-17 is managed through the Adaptive Resource Control (ARC) software system developed jointly between SES and Kythera Space Solutions, autonomously optimizing space and ground resources, on-the-fly, in accordance with customers' changing needs.
On 12 September 2016, SES ordered the SES-17 dedicated Ka-band high-throughput satellite from Thales Alenia Space of France and Italy, the main contractor for SES's O3b MEO satellites. Offering mobility connectivity services over the Americas and the Atlantic Ocean, SES-17 was expected to launch in 2020 with the FlytLIVE airline passenger connectivity service from Thales Avionics as its anchor customer. Prior to the launch of SES-17, FlytLIVE would use capacity contracted by SES on Hughes's EchoStar XVII and EchoStar XIX satellites, along with SES's own AMC-15 and AMC-16 satellites. The cost of the satellite and launch, and the network of gateways on the ground is expected to be around US$500 million.
In September 2017, SES announced that Arianespace had been selected to launch SES-17 in 2021.
In September 2019, SES announced it had partnered with satellite payload and network management systems developer, Kythera Space Solutions to develop the ARC (Adaptive Resource Control) software to enable the dynamic control and optimisation of power, throughput, beams and frequency allocation on SES-17 and other future high-throughput satellites and their networks.