“Northrop Grumman is still working extremely hard to analyze what is causing these anomalies during the ferry flight,” she said. NASA 's Ionospheric Connection ##s mission , originally scheduled for 2017 , has been delayed until spring 2019 at the earliest because of problems with a Pegasus XL rocket . The rocket has been hampered by issues with its separation system and off - nominal data that led to launches in late 2017 , January 2018 and November 2018 being abandoned . Northrop Space Innovation ##s , which built the rocket , said it is working to resolve the issue , but provided no specific details .
NASA 's Ionospheric Connection ##s mission , originally scheduled for 2017 , has been delayed until spring 2019 at the earliest because of problems with a Pegasus XL rocket . The rocket has been hampered by issues with its separation system and off - nominal data that led to launches in late 2017 , January 2018 and November 2018 being abandoned . Northrop Space Innovation ##s , which built the rocket , said it is working to resolve the issue , but provided no specific details .