Space Systems Development and Integration (SSDIF) Facility
Spacecraft Systems Development and Integration Facility (SSDIF)
is an 86,000 square foot (7989.4 square meter) building used
to integrate and test space hardware. Located at Goddard Space
Flight Center in Greenbelt, MD, this facility houses the 1.3
million cubic foot (36,811.76 cu meters) High Bay Clean Room.
The largest of its kind anywhere, this clean room plays an
important role in Hubble servicing.
entering this room must wear a "bunny suit"-these are special
coveralls, hoods, boots, gloves and masks. This gear helps
protect the sensitive flight hardware from particles that
could impede performance.
STS-103 astronauts trained in this room-as did the crews from
the two previous Hubble servicing missions. Using the clean
room's very precise mechanical and electrical simulators,
they practiced installing the actual Hubble hardware. This
is where the Shuttle platform resides that is used to anchor
Hubble. It is also home to the Shuttle carriers that take
new Hubble instruments, tools and other hardware to orbit.
If something unexpected happens during the mission, the clean
room could become a hub of activity as Hubble engineers work
to solve the problem.
standing in front of the SSDIF door
standing beside HiFi (High Fidelity Mechanical Simulator)
- At 125 feet (38.1 meters) long, 100 feet (30.48 meters)
wide and 89 feet (27.13 meters) high, it can simultaneously
hold the entire contents of two Shuttle cargo bays.
- It is 1,000 times cleaner than a hospital operating room.
- One whole wall is made up of HEPA filters that remove
particles smaller than a red blood cell.
- Air constantly circulates through the filters, across
the room, out tiny holes in the opposite wall, over the
ceiling and back through the filters.
- Two 35-ton cranes are suspended 69 feet (21.03 meters)
and 80 feet (24.38 meters) above the floor.
- A computerized system monitors and controls the environment
24 hours a day, 365 days a year.
- Only properly trained, "bunny-suited" people may enter.
- For easy identification, astronauts are the only people
who wear blue hoods.