Delta 4 Heavy’s Final Launch: ULA Resumes Mission After Scrub
The highly anticipated final launch of the Delta 4 Heavy rocket by United Launch Alliance (ULA) is back on track after a temporary setback caused by technical issues. The rocket, poised for liftoff from Cape Canaveral Space Force Station, is set to deliver the NROL-70 mission payload for the National Reconnaissance Office (NRO).
Originally scheduled for March 28, the launch faced delays due to an unforeseen problem with a gaseous nitrogen pipeline. However, ULA has resolved the issue, allowing for a rescheduled launch attempt on Tuesday afternoon.
As preparations for liftoff continue, viewers can expect live coverage from Spaceflight Now leading up to the scheduled launch time. The Delta 4 Heavy rocket is slated to take off from Space Launch Complex 37 (SLC-37), with a launch window extending over a four-hour period to accommodate any adjustments needed.
During the previous launch attempt, last-minute complications, including ground wind violations and nitrogen pump issues, led to a delay just minutes before liftoff. However, ULA President and CEO Tory Bruno expressed confidence in addressing these challenges for the upcoming launch.
The resolution of the gaseous nitrogen pump issue involved collaboration between ULA, NASA, and Air Liquide, the company managing the affected pipeline system. Air Liquide confirmed a pump failure at its nitrogen plant supplying NASA’s Space Launch System (SLS) and worked diligently to rectify the situation.
In response to these developments, NASA expressed appreciation for Air Liquide’s efforts and affirmed ongoing monitoring of critical infrastructure to ensure mission success. Favorable weather forecasts by the 45th Weather Squadron further bolster confidence in the rescheduled launch.
The NROL-70 mission, shrouded in secrecy due to its classified nature, will deploy a vital satellite for the NRO. Dr. Chris Scalese, NRO Director, emphasized the mission’s importance in enhancing ground capabilities for various stakeholders, including policymakers and the military.
With the retirement of the Delta 4 Heavy rocket, attention turns to ULA’s Vulcan rocket, poised to assume its predecessor’s responsibilities. Despite recent speculation about changes to certification plans, ULA remains committed to its two-flight certification mission for Vulcan.
Looking ahead, ULA’s partnership with the NRO and other entities underscores its pivotal role in national security space missions. The forthcoming launch of the Boeing Starliner Crew Flight Test further highlights ULA’s expanding portfolio in space exploration and transportation.
As the countdown to liftoff resumes, anticipation builds for the final chapter of the Delta family of rockets and the dawn of a new era with ULA’s Vulcan rocket at the forefront of space innovation and exploration.
