ULA scrub leaves 2 SpaceX launches remaining this weekend

Delta IV Heavy launch scrubs again; SpaceX aiming for 2 launches on Sunday

SpaceX launches 11th batch of Starlink satellites
SpaceX launches 11th batch of Starlink satellites

CAPE CANAVERAL, Fla. – This week started out with the likelihood of three launches in three days but a scrub caused a bit of reorganizing and now there could be two launches in a period of about nine hours.

United Launch Alliance was set to be the first of three but ended in a scrub Saturday morning.

The first attempt Thursday morning to send up a national security satellite for the National Reconnaissance Office also ended in a scrub and the company tried again Saturday but the liftoff was halted 3 seconds before T-0.

The national security payload is known as NROL-44. Liftoff of the Delta IV Heavy rocket was set for Thursday morning, but the first attempt was scrubbed due to an issue with a critical ground pneumatic control system.

There are two more launch opportunities this weekend for ULA but the company has not announced when the next liftoff attempt will happen from Space Launch Complex-37 at Cape Canaveral Air Force Station.

According to ULA CEO Tory Bruno, the first scrub was caused by an issue is with the gas ground system involved in preparing the rocket for launch.

“We had anomalous data from this system last night that had to be thoroughly understood before proceeding to ignition. The time to do this took us past the launch window,” Bruno said in a tweet Thursday.

ULA officials said Friday the assessment is complete and the grounds system is working as it should. On Saturday, the mega rocket did not get off the ground due to an unexpected condition three seconds before liftoff, prompting an automatic abort. ULA officials said it would take at least seven days to assess the issue and select a new launch date.

Meanwhile, SpaceX will attempt two launches on Sunday, including the landing of two rocket boosters. However, the weather could be a problem.

SpaceX is targeting Sunday to launch its own payload in the form of 60 Starlink satellites, marking the 12th round of internet-beaming satellites. This launch shifted from Saturday to Sunday in the rocket shuffle. Weather is currently 50% “Go” for the 10:12 a.m. liftoff from Kennedy Space Center Launchpad 39A.

The launch will push the Starlink constellation above 600. The company plans to roll out internet service with the fleet later this year, according to SpaceX’s website.

Post-launch SpaceX plans to land the rocket booster at sea and fly it again.

Later in the day, at 7:18 p.m. SpaceX could try to launch an Earth-observing satellite for Argentina, the 45th Space Wing forecast shows.

Due to the ULA scrub, SpaceX delayed its launch for the Argentina Space Agency, or CONAE, which was scheduled for Friday.

The forecast is only 40% favorable for liftoff on Sunday evening, according to weather officers with the 45th Space Wing.

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This particular launch is unique because the satellite requires a polar orbit to get above the South Pole. It’s the first satellite with a polar-orbit launching from Florida since Nov. 30, 1960. Most polar launches happen from California’s Vandenberg Air Force Base because a polar launch from Florida puts the rocket trajectory over land, specifically Cuba.

This launch will also include a landing back at Cape Canaveral, the first since March. All other rocket booster landings this year have been in the Atlantic Ocean on a droneship.

Again, it’s possible this could all change because of weather or technical issues. Stay with ClickOrlando.com/space for updates.


Here’s a recap of the launches happening in the next 48 hours:

Saturday

ULA Delta IV Heavy with NROL-44

Launch time: 2:04 a.m.

Weather forecast: 80% favorable

Sunday

SpaceX Falcon 9 with Starlink satellites

Launch window: 10:03-10:14 a.m. (10:12 a.m. targeted launch)

Booster landing: Yes, at sea

SpaceX Falcon 9 with CONAE satellite

Launch window: 7:14 and 7:24 p.m. (7:18 p.m. targeted launch)

Weather: 40% favorable

Booster landing: Yes, at Cape Canaveral Landing Zone 1


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