Europe’s Ariane 5 rocket stands ready for a sunset liftoff from French Guiana on its fifth mission of the year, targeting a launch window of 21:51 to 22:24 UTC on Tuesday to send two heavy communications satellites into Geostationary Transfer Orbit for Luxembourg’s Intelsat and Japan’s B-SAT.

A 55-meter tall Ariane 5 rockets rolls out from its Final Assembly Building to the ELA-3 launch pad at the Guiana Space Center on September 4, 2017 for liftoff with a pair of heavy communications satellites.

Two satellites – Intelsat 37e and BSat-4a – take their spots atop the Ariane 5 VA239 launch vehicle at the Guiana Space Center for a September 2017 liftoff.

The Intelsat 37e satellite and BSat-4a undergo final preparations for a tandem launch atop Europe’s Ariane 5 rocket in September 2017.

An Ariane 5 ECA Rocket is assembled at the Guiana Space Center to receive a payload of two broadcasting and telecommunications satellites for liftoff in September 2017 on the vehicle’s fifth mission of the year.