A final, full rehearsal has confirmed that teams at ESA's mission control are ready for tomorrow's launch of the Sentinel-1B radar satellite.

An Arianespace rocket carrying Sentinel-1B is set to deliver the next satellite in Europe's Copernicus Earth environmental monitoring programme into orbit tomorrow.

Liftoff on a multistage Soyuz from ESA's Spaceport in Kourou, French Guiana, is planned for 22 April at 21:02 GMT (23:02 CEST).

Sentinel-1B will join the identical Sentinel-1A, which has been in orbit since April 2014, to form a twin-satellite constellation, orbiting 180° apart.