https://www.cnet.com/news/spacex-falcon-9-govsat-1-falcon-heavy-elon-musk/

SpaceX has some routine business to take care of this week before the long-anticipated debut of Falcon Heavy, its newest and most powerful rocket yet. 

Elon Musk's commercial space venture on Tuesday scrubbed the scheduled launch of a recycled Falcon 9 rocket set to lift the GovSat-1 satellite into orbit. The mission was called off so SpaceX can swap out a sensor on the rocket. Weather conditions had also been less than ideal for launch much of Tuesday. The launch will now be attempted again from Florida's Cape Canaveral Air Force Station on Wednesday during a window starting at 1:25 p.m. PT.