Watch conditions at Kennedy Space Center during Tropical Storm Isaias

Days after SpaceX opened preorders for Starlink internet service, two more Falcon 9 rockets are set to launch from Florida’s Space Coast as soon as Sunday night and Wednesday morning — weather permitting — to help push the network closer to commercial operations.

One of the two Falcon 9 rockets SpaceX planned to take off in a span of less than five hours earlier this week will remain grounded indefinitely, preventing Cape Canaveral from hosting two launches on the same day for the first time in decades. But the military-run Eastern Range was ready for the back-to-back missions, and probably won’t have to wait long for the next chance for a launch doubleheader.

SpaceX launched 57 Starlink broadband satellites and a pair of Earth observation smallsats for BlackSky on top of a Falcon 9 rocket at 1:12 a.m. EDT (0512 GMT) Friday. The 90th launch of a Falcon 9 rocket took off from pad 39A at NASA’s Kennedy Space Center in Florida.