WEBVTT

00:00:00.000 --> 00:00:06.000
Intro music.

00:00:06.000 --> 00:00:12.000
A replacement gyro destined for the International Space Station has arrived at the Kennedy Space Center.

00:00:12.000 --> 00:00:17.000
The new CMG -- or Control Moment Gyro -- is undergoing testing.

00:00:17.000 --> 00:00:21.000
The testing is a general health check to prepare it for launch aboard the Space Shuttle.

00:00:21.000 --> 00:00:26.000
Testing will insure that the gyro is in good working order before leaving Earth.

00:00:26.000 --> 00:00:33.000
The gyro replacement on the ISS requires a spacewalk to remove the malfunctioning CMG and to install the new one.

00:00:33.000 --> 00:00:39.000
This will restore the ISS to four fully functioning CMGs, which are critical to the operation

00:00:39.000 --> 00:00:43.000
explains Kennedy Space Center's Lead Avionics Engineer Dean Orr.

00:00:43.000 --> 00:00:50.000
"The Control Moment Gyroscope is very critical to the Station because it maintains the smooth attitude control of the Station,

00:00:50.000 --> 00:00:57.000
which is control of the Station and steering on the roll, pitch and yaw axes of the Station.

00:00:57.000 --> 00:01:02.000
The Control Moment Gyroscopes also maintain the microgravity environment.

00:01:02.000 --> 00:01:07.000
They maintain a smooth environment for the scientific experiments on board the Space Station."

00:01:07.000 --> 00:01:17.000
When the current testing is complete, the Control Moment Gyro will be ready for pre-launch processing.

00:01:17.000 --> 00:01:22.000