At approximately 11:45 a.m. today, a fire alarm was triggered in the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida. The notification came when an arc flash event occurred at a connector on an electrical panel in High Bay 3. A spark landed on a rope marking the boundary of the work area. The rope began to smolder, workers pulled the alarm, and employees evacuated the building safely.
The incident occurred on the third floor of F-tower at the Mobile Launcher power connection. Technicians shut down power to the panel, and the center’s emergency responders declared the VAB safe for employees to return to work. There were no reported injuries, and the Artemis I rocket and spacecraft were not at risk.
The Artemis I vehicle and mobile launcher entered High Bay 3 earlier this morning after rolling back from Launch Complex 39B in advance of Hurricane Ian, which is expected to bring sustained tropical storm force winds to Kennedy as early as Wednesday evening. Engineers and technicians are evaluating the cause.
The Space Launch System rocket’s interim cryogenic propulsion stage (ICPS) has been powered up, the NASA test director has given the “go” for booster power up, and all non-essential personnel have left the launch pad area in preparation for propellant loading operations.
At 10:53 p.m. EDT, or L-9 hours, 40 minutes, the launch team is expected to reach a planned two hour, 30-minute built-in hold. During this time, the mission management team will review the status of operations, receive a weather briefing, and make a “go” or “no-go” decision to proceed with tanking operations.
Tanking milestones include filling the rocket’s core stage with several hundred thousand gallons of liquid oxygen and liquid hydrogen. This will occur over a series of different propellant loading milestones to fill and replenish the tanks.
At midnight, NASA TV coverage begins with commentary of tanking operations to load propellant into the SLS rocket. Full coverage begins at 6:30 a.m.
Since replacing an engine controller on RS-25 engine number four that is on the Space Launch System (SLS) rocket core stage, NASA, and lead engines contractor Aerojet Rocketdyne, have performed a series of tests to ensure the engines and controllers are ready to support the Artemis I mission. All four engine controllers performed as expected during power up, as part of the Artemis I Core Stage engineering tests.
Aerojet Rocketdyne and its manufacturer of the engine flight controller, conducted numerous tests on the faulty engine four controller and determined the cause to be a faulty memory chip. The device is used only during the controller start-up sequence and has no impact on controller operations beyond that point. There is no indication of faulty memory chips on the other three engines, and therefore no related constraints to the wet dress rehearsal or launch.
Kennedy teams are completing remaining SLS pre-flight diagnostic tests and hardware closeouts, including testing the flight termination system on the SLS and installing instrumentation on the twin solid rocket boosters, in advance of rolling the rocket and spacecraft to Launch Pad 39B for the first time next month for a final test before launch. This final test, known as the wet dress rehearsal, will run the launch team through operations to load propellant into the rocket’s tanks and conduct a full launch countdown.
During the test at the launch pad, engineers will be on duty in the Launch Control Center and in other stations where they will work during the Artemis I launch. They will capture as much data as possible on the performance of all the systems that are part of SLS and the Orion spacecraft as well as the Kennedy ground systems. NASA will set a target launch date after a successful wet dress rehearsal test.
NASA has updated the schedule to move the combined Space Launch System rocket and Orion spacecraft out of the Vehicle Assembly Building (VAB) to Launch Pad 39B at the agency’s Kennedy Space Center in Florida for testing to no earlier than March 2022.
NASA has added additional time to complete closeout activities inside the VAB prior to rolling the integrated rocket and spacecraft out for the first time. While the teams are not working any major issues, engineers continue work associated with final closeout tasks and flight termination system testing ahead of the wet dress rehearsal.
Teams are taking operations a step at a time to ensure the integrated system is ready to safely launch the Artemis I mission. NASA is reviewing launch opportunities in April and May.
This week, engineers and technicians successfully completed an engineering test series of the Space Launch System (SLS) rocket core stage inside the Vehicle Assembly Building at NASA’s Kennedy Space Center as part of the integrated testing before launch.
After replacing and testing one of four RS-25 engine controllers, the team conducted several tests to ensure the massive core stage is ready to roll to the launch pad for the wet dress rehearsal ahead of the Artemis I launch. Engineers and technicians tested communication between the flight computers and other core stage systems and slightly moved the engines to practice the gimbaling they will experience during flight.
All four engine controllers were powered up and performed as expected as part of the Artemis I Core Stage engineering tests. Following the power up, engineers successfully performed diagnostic tests on each controller.
Up next, the team will conduct a second countdown sequencing test to demonstrate the ground launch software and ground launch sequencer, which checks for health and status of the vehicle while at the pad. The simulated launch countdown tests the responses from SLS and the Orion spacecraft, ensuring the sequencer can run without any issues. After the countdown test and final closeouts are complete, SLS and Orion will head to the launch pad for the first time to complete the wet dress rehearsal test.
Final stacking operations for NASA’s mega-Moon rocket are underway inside the Vehicle Assembly Building at NASA’s Kennedy Space Center as the Orion spacecraft is lifted onto the Space Launch System (SLS) rocket for the Artemis I mission. Engineers and technicians with Exploration Ground Systems (EGS) and Jacobs attached the spacecraft to one of the five overhead cranes inside the building and began lifting it a little after midnight EDT.
Next, teams will slowly lower it onto the fully stacked SLS rocket and connect it to the Orion Stage Adapter. This will require the EGS team to align the spacecraft perfectly with the adapter before gently attaching the two together. This operation will take several hours to make sure Orion is securely in place.
NASA will provide an update once stacking for the Artemis I mission is complete.
Engineers with Exploration Ground Systems and contractor Jacobs successfully completed the Umbilical Release and Retract Test on Sept. 19 inside the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in preparation for the Artemis I mission.
The umbilicals will provide power, communications, coolant, and fuel to the rocket and the Orion spacecraft while at the launch pad until they disconnect and retract at ignition and liftoff.
“Previous testing at the Launch Equipment Test Facility and in the VAB refined our designs and processes and validated the subsystems individually, and for Artemis I, we wanted to prove our new systems would work together to support launch,” said Jerry Daun, Jacobs Arms and Umbilical Systems Operations Manager.
“This test is important because the next time these ground umbilical systems are used will be the day of the Artemis I launch,” said Scott Cieslak, umbilical operations and testing technical lead.
Teams will continue conducting tests inside the VAB before transporting the Orion spacecraft to the assembly building and stacking it atop the SLS, completing assembly of the rocket for the Artemis I mission.
“It was a great team effort to build, and now test, these critical systems,” said Peter Chitko, arms and umbilicals integration manager. “This test marked an important milestone because each umbilical must release from its connection point at T-0 to ensure the rocket and spacecraft can lift off safely.”
Artemis I will be the first integrated test of the SLS and Orion spacecraft. In later Artemis missions, NASA will land the first woman and the first person of color on the surface of the Moon, paving the way for a long-term lunar presence and serving as a steppingstone on the way to Mars.
Teams at NASA’s Kennedy Space Center in Florida are putting the final touches on the Orionspacecraft for the Artemis I mission by connecting the ogive fairings for the launch abort system (LAS) assembly. Pronounced oh-jive, the ogive fairings consist of four protective panels, and their installation will complete the LAS assembly.
Technicians and engineers from the center’s Exploration Ground Systems and contractor Jacobs recently finished attaching the launch abort tower to the top of the Orion crew module. They then began lifting and mating the lightweight fairings, which will shield the crew module from the severe vibrations and sounds it will experience during launch. One of the fairing panels has a hatch to allow access to the crew module before launch.
During Artemis missions, the 44-foot-tall LAS will detach from the spacecraft when it is no longer needed, shortly after launching on the Space Launch System (SLS) rocket, to lighten the journey to the Moon. Although the abort motors will not be active on the uncrewed Artemis I flight test, the system is intended to protect astronauts on future missions if a problem arises during launch or ascent by pulling the spacecraft away from a failing rocket.
Once LAS installation is complete, the spacecraft will leave the Launch Abort System Facility and continue on its path to the pad, making its way to the spaceport’s Vehicle Assembly Building to be integrated with the SLS rocket ahead of the launch.
Ahead of the Artemis I lunar-bound mission, teams at NASA’s Kennedy Space Center joined the launch abort tower to the Orion spacecraft on July 23. Working inside the spaceport’s Launch Abort System Facility, engineers and technicians with Exploration Ground Systems and primary contractor, Jacobs, lifted the system above the spacecraft and coupled it with the crew module.
The launch abort system is designed to protect astronauts if a problem arises during launch by pulling the spacecraft away from a failing rocket. Although there will be no crew Artemis I, the launch abort system will collect flight data during the ascent to space and then jettison from the spacecraft.
Next, teams will install four ogives – the protective panels that shield the upper portion of the spacecraft during its entry into orbit. Once final checkouts are complete, Orion will be integrated with the Space Launch System rocket.
The Orion spacecraft for the Artemis I mission recently completed fueling and servicing checks while inside the Multi-Payload Processing Facility at NASA’s Kennedy Space Center in Florida. The capsule has now made it to its next stop on the path to the pad – the spaceport’s Launch Abort System Facility.
Crowning the spacecraft with its aerodynamic shape, the launch abort system is designed to pull crew away to safety from the Space Launch System (SLS) rocket in the event of an emergency during launch. This capability was successfully tested during the Orion Pad Abort and Ascent Abort-2 tests and approved for use during crewed missions.
Teams with Exploration Ground Systems and contractor Jacobs will work to add parts of the launch abort system onto the spacecraft. Technicians will install four panels that make up the fairing assembly and protect the spacecraft from heat, air, and acoustic environments during launch and ascent. A launch tower will top the fairing assembly to house the pyrotechnics and a jettison motor. The system will also be outfitted with instruments to record key flight data for later study.
With successful demonstration of the system during previous tests, the abort motor that pulls the spacecraft away from the rocket and attitude control motor that steers the spacecraft for a splashdown during an abort will not be functional for the uncrewed Artemis I mission. The jettison motor will be equipped to separate the system from Orion in flight once it is no longer needed, making Orion thousands of pounds lighter for the journey to the Moon.
Launching in 2021, Artemis I will be a test of the Orion spacecraft and SLS rocket as an integrated system ahead of crewed flights to the Moon. Under Artemis, NASA aims to land the first woman and first person of color on the Moon and establish long-term lunar exploration.