Live coverage of the countdown and launch of a Soyuz rocket from French Guiana with Europe’s Sentinel 1B radar Earth observation satellite, France’s Microscope relativity probe and three CubeSats from Belgium, Italy and Denmark. Text updates will appear automatically below; there is no need to reload the page. Follow us on Twitter.
Live video coverage from Arianespace begins at 2045 GMT (4:45 p.m. EDT).
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Mission Reports
First satellites off OneWeb’s new Florida assembly line set for launch this week
The first 34 satellites manufactured on a new commercial spacecraft assembly line just outside the gates of the Kennedy Space Center in Florida are scheduled for liftoff on a Soyuz rocket Thursday halfway around the world in Kazakhstan, kicking off a sequence of up to 20 launches from three countries to deploy nearly 650 satellites for OneWeb’s global Internet network.

Mission Reports
Live coverage: Japan’s enhanced Epsilon booster blasts off
A Japanese Epsilon rocket launched Tuesday from the Uchinoura Space Center, a shoreline spaceport on the southern Japanese island of Kyushu, with a space weather research probe to study phenomena inside the turbulent Van Allen radiation belts. Liftoff of the 85-foot-tall rocket occurred at 1100 GMT (6 a.m. EST).