The Alpha rocket will try for a Tuesday liftoff at Vandenberg Space Force Base following Monday’s delay due to a sensor reading, according to Firefly Aerospace. 

“The Alpha Flight 7 team completed testing and verified all sensors are reading nominal. We’ve stepped back into final launch operations for liftoff of the Stairway to Seven tonight,” Firefly said Tuesday afternoon.

The two-hour window opens at 5:50 p.m. for the rocket at Space Launch Complex-2.

A livestream of the mission can be found by clicking here about 20 minutes before liftoff.

Tuesday’s countdown comes after the team paused their plans Monday.

“Out of an abundance of caution, Firefly made the decision to stand down on today’s Alpha Flight 7 test flight to investigate a sensor reading that was out of range,” Firefly representatives posted on social media Monday.

Once verification is complete, the team will work with Vandenberg officials to confirm the next available launch date, Firefly added.

While Tuesday had been a backup opportunity, the team finally confirmed early in the afternoon they would resume counting down to liftoff.

The team scrubbed Monday’s countdown after crews had started fueling the rocket for the Stairway to Seven mission. 

Following several flaws on earlier launches, Firefly has labeled this as a test flight to demonstrate the first- and second-staged boosters perform as planned. 

The flight also will demonstrate several features from the next-generation Alpha rocket.

Texas-based Firefly created Alpha to carry smaller payloads for national security, commercial and civil missions. 

Alpha, stand 96.7 feet tal,l employs carbon fiber composite structure to lift heavier payloads at a lower cost, according to Firefly. The small vehicle can carry payloads weighing  up to 2,205 pounds. 

In comparison, Alpha stands shorter than the 229.6-foot-tall Falcon 9 rocket built by SpaceX. That firm’s rocket can deliver payloads to low-Earth orbit weighing up to 55,000 pounds. 

The Alpha rocket debut liftoff met a dramatic end Sept. 2, 2021 shortly after lifting off from Vandenberg. 

The firm’s following missions have encountered mixed results, with Alpha’s most recent liftoff in April experiencing a glitch that kept the satellites from reaching orbit.