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SES-17 Milestones

Curious about the SES-17 journey? Say no more.
Check out the key highlights below!



Successful launch

OCTOBER - SES-17 was successfully launched into space onboard an Ariane 5 launcher operated by Arianespace from the Europe’s Spaceport in Kourou, French Guiana at 11:10 pm local time (02:10 am UTC).


Arrival at launch site

SEPTEMBER - SES-17 has arrived to Arianespace’s Guiana Space Centre in Kourou, French Guiana


Shipped to location

SEPTEMBER - SES-17 has been shipped from Thales Alenia Space facility in Cannes, France.


Scheduled to launch

SEPTEMBER - SES-17 is scheduled to be launched by Arianespace, using an Ariane 5 vehicle on 22 October 2021

Read the press release

Compact Antenna Test Range

AUGUST - The antennas are tested in an anechoic chamber, which simulates the environment in outer space. This test not only measures the performance of the antennas themselves, it also ensures that there will be no interference from any of the many other components and systems.

Satellite Vibration Test

JULY - Satellite Vibration Test. During launch the satellite will be subject to extreme vibration and high levels of acoustic noise, both of which could potentially damage or impair components. It is therefore essential that that the satellite undergoes similar vibration and acoustic testing prior to launch. The vibration test simulates every type of vibration that the SES-17 may encounter on its journey to its orbital location.

Thermal Vacuum test completed

APRIL - SES-17 left the TVAC chamber where it successfully completed all testing.

Thermal Vacuum test commenced

FEBRUARY - During this phase the satellite is in a vacuum and subjected to extremes of temperature such as may be encountered during its lifetime in space. The thermal vacuum chamber (TVAC) is one of the largest in Europe, but to make SES-17 fit, part of the door had to be carved out.


First solar array deployment test completed

SEPTEMBER - The solar arrays are only a couple of centimetres thick but will need to deal with extreme temperatures varying between +140°C and -200°C. Furled for launch, deploying the solar arrays after separation is a delicate operation that relies on a series of pulleys, hinges, cables and springs all working in perfect synchronisation.

Service and Payload Modules successfully integrated

MAY - This is a major milestone and is one of the last steps in assembling the complete satellite.


Arianespace to launch SES-17

Weighing over six metric tons, SES-17 will be one of the 10 largest satellites ever launched by Arianespace. It will also be the third all-electric satellite that Arianespace has launched for SES.

Read the press release


SES-17, a Ka-Band HTS ordered from TAS

The most powerful, advanced and flexible GEO satellite in our fleet will provide data services over the Americas, Caribbean Sea and Atlantic Ocean.

Read the press release

Thales Avionics signed as anchor customer

SES-17 will provide connectivity services tailor-made for commercial aviation over the Americas to FlytLIVE by Thales. Passengers will be able to experience high-speed WiFi in the air as they do at home.

Read the press release