Live coverage: Delta 2 launches

An Indian Geosynchronous Satellite Launch Vehicle debuting an upgraded higher-thrust second stage engine lifted off at 1126 GMT (7:26 a.m. EDT) Thursday with an S-band communications satellite.

Juggling simultaneous launch campaigns on both coasts, a team of SpaceX engineers put a Falcon 9 rocket through a customary countdown rehearsal and hold-down firing Tuesday at Vandenberg Air Force Base in California ahead of a scheduled liftoff Sunday.

Iridium has secured a launch for five more of its next-generation communications craft in a rideshare arrangement with two U.S.-German research satellites aboard a SpaceX Falcon 9 rocket by early 2018.