On Tuesday, SpaceX halted the planned launch minutes before liftoff due to a technical issue, though it said afterward the rocket and payload "remain healthy". The blue origin is launching about 19 minutes later than that of Space X. and the third is most probably scheduled at 11:37 am by the Eastern Standard Time.
For the second consecutive day, SpaceX scrubbed the launch of a Falcon 9 rocket on Wednesday morning that will carry the first in what will one day be a constellation of advanced Global Positioning System satellites at Cape Canaveral Air Force Station.
Elon Musk's company SpaceX has been forced to postpone the launch of a rocket as part of its first ever mission for the U.S. Air Force due to an "out of family reading on first stage sensors", according to the company.
The launch is scheduled for 9:34 a.m.
Another space mission has already successfully launched today: The Indian Space Research Organisation successfully launched the GSAT-7A communications satellite at 5:40 a.m. EST (1040 GMT) from the Satish Dhawan Space Centre in Sriharikota, India.
Elon Musk's SpaceX has cancelled the long-delayed launch of a navigation satellite for the USA military, failing to complete its first designated national security mission for the United States because of technical issue with its rocket.
If all the rockets now scheduled launch as planned, there could be five launches within a 24 hour period.
Vice-President Pence was at NASA's Kennedy Space Center to watch this morning's flight and made remarks following the scrubbed attempt. All the technical issues were all overcome, and then rockets were launched.
In addition, Arianespace, the European consortium that markets French-built Ariane and Russian-built Soyuz boosters, had to call off a Soyuz launch from French Guiana because of high winds.
Wednesday's launch is set to be the first of 32 satellites in production by Lockheed under contracts worth a combined $12.6 billion for the Air Force GPS III program, Lockheed spokesman Chip Eschenfelder said.
Musk's rocket was due to launch this afternoon at 2.11pm United Kingdom time.