In
this section
Communication
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Communication
The ISS must
be able to communicate with flight controllers on the ground daily and,
astronauts must be able to communicate with each other within the ISS
and when conducting spacewalks outside the station.
Talking with
the Ground
NASA's Mission Control in Houston will send signals to a 60-foot radio
antenna at White Sands Test Facility. White Sands will relay the signals
to a pair of Tracking and Data Relay satellites. The satellites will relay
the signals to the U.S. portion of the ISS and/or the space shuttle if
it is attached.
During the early phase, signals will be sent through the Russian Space
Agency's communications system of ground stations and/or satellites.
The ISS has two systems for communicating with the ground:
S-band - voice, commands, telemetry and data files
Ku-band (high bandwidth) - video and transfer of two-way data files
Talking Within
the ISS and to Spacewalkers
The Internal Audio Subsystem (IAS) will provide intercom, telephone and
alarm system communications within the ISS's pressurized modules.
The IAS will also connect with the following:
- Ultra-High Frequency (UHF), to talk with spacewalkers
- External connectors, to talk with a docked space shuttle
- Russian segment's audio system
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