Both are cylindrical chambers that have the ability to provide a near vacuum, and have configurable lighting systems for simulating sunlight from a variety of angles.

Test subject equipment can be maneuvered using four overhead cranes, each with a carrying capacity of 50,000 pounds.

In addition to solar lighting arrays, the facility is capable of generating thermal plasma fields of a type experienced in the outer atmosphere and low Earth orbit.

[3] NASA remodeled and upgraded the chamber to test the James Webb Space Telescope.

Like Chamber A, it has two airlocks; one of them is configured to a water deluge system and other elements needed to simulate oxygen-rich environments encountered on spacecraft.