Live coverage: Two satellites lift off aboard Ariane 5

Take a trip around the perimeter of the Ariane 5 rocket’s launch zone in Kourou, French Guiana, where two Intelsat communications satellites are poised for liftoff Wednesday.

Russian rocket technicians planned to swap out a failed inertial measurement unit inside a Soyuz rocket overnight Sunday after a failure in the navigation system forced officials to abort the booster’s planned launch of five satellites from French Guiana.

Four satellites set to join O3b’s expanding broadband network successfully launched Friday on top of a Russian-built Soyuz booster from French Guiana, joining 12 other craft linking developing nations, far-flung islands, cruise ships and other hard-to-reach locales with the Internet.