Parker Solar Probe Begins Space Environment Testing

People in clean suits work on the spacecraft inside a large chamber
Parker Solar Probe team members from the Johns Hopkins Applied Physics Laboratory work to attach testing and monitoring equipment and sensors to the spacecraft inside the thermal vacuum chamber at NASA’s Goddard Space Flight Center. Space environment testing duplicates the airless environment of space and simulates the cold and hot temperature cycles the spacecraft will endure during its seven-year exploration of the Sun. Credit: NASA/Johns Hopkins APL/Ed Whitman

On Saturday, Jan. 27, NASA’s Parker Solar Probe began space environment testing, starting with the air being pumped out of the 40-foot-tall thermal vacuum chamber at NASA’s Goddard Space Flight Center in Greenbelt, Maryland where the spacecraft is currently housed. The chamber – officially called the Space Environment Simulator – creates a nearly identical replication of the conditions the spacecraft will face during its mission to the Sun.

After the air was slowly removed from the chamber over the course of five hours, cooling tubes behind the chamber walls were chilled to -320 degrees Fahrenheit (-196 Celsius).

Several people in clean suits work on the spacecraft inside a large chamber
Members of the Parker Solar Probe team prepare the spacecraft for space environment testing in the thermal vacuum chamber at NASA’s Goddard Space Flight Center. The thermal vacuum chamber duplicates the airless environment of space and simulates the cold and hot temperature cycles the spacecraft will endure during its seven-year exploration of the Sun. Credit: NASA/Johns Hopkins APL/Ed Whitman

Engineers will cycle the chamber’s temperatures from hot to cold to ensure Parker Solar Probe will be prepared for operations around the Sun. During this cycling, the spacecraft’s systems will undergo testing that mimics critical events that occur during its planned seven-year mission in space. The tests are designed to make sure all the systems and components of Parker Solar Probe are operating as designed.

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This space environment testing will continue for about seven weeks. Parker Solar Probe will emerge from the vacuum chamber in mid-March for final tests before setting off for Florida, where it will launch from NASA’s Kennedy Space Center on July 31, 2018.

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By Justyna Surowiec

Johns Hopkins Applied Physics Laboratory

The spacecraft sits inside a large chamber with wires all around an two people in clean suits in the background.
To prepare NASA’s Parker Solar Probe for space environment testing, the team must make hundreds of connections to allow the engineers and technicians to monitor the safety and performance of the spacecraft’s systems. Four hundred thermocouples mounted on the spacecraft let the team track the health of the probe as it undergoes temperature cycling in the thermal vacuum chamber at NASA’s Goddard Space Flight Center. Credit: NASA/Johns Hopkins APL/Ed Whitman
The spacecraft is seen from a low angle inside the thermal vacuum chamber.
NASA’s Parker Solar Probe sits inside the thermal vacuum chamber at NASA’s Goddard Space Flight Center. On Jan. 27, the spacecraft began space environment testing inside the chamber, which simulates the hot and cold airless environments that the mission will experience during its voyage to the Sun. Credit: NASA/Johns Hopkins APL/Ed Whitman
The spacecraft is seen sitting in a large chamber through the doorway.
NASA’s Parker Solar Probe sits inside the thermal vacuum chamber at NASA’s Goddard Space Flight Center just before the main hatch is closed to begin space environment testing. The thermal vacuum chamber duplicates the airless environment of space and simulates the cold and hot temperature cycles the spacecraft will endure during its seven-year exploration of the Sun. Credit: NASA/Johns Hopkins APL/Ed Whitman