Atlantis delivered a repaired S-band Antenna Sub-Assembly (SASA) to the ISS which was returned to Earth during the STS-120 mission in October 2007.
SASA is a space station antenna assembly consisting of
Assembly Contingency Radio Frequency Group (RFG or ACRFG)
SASA Boom
Avionics Wire Harness
Major functions of the ACRFG are to transmit/receive radio signals to/from the transponder, amplification of signals to a power level necessary to be acquired by a Tracking Data and Relay Satellite and to broadcast/receive signals through the selected antenna.

The SASA boom assembly consists of a mast, an extra-vehicular activity (EVA) handle, a harness, a connector panel, a mounting surface for the RFG and a baseplate fitting.
The fitting will serve as the structural interface for mounting the SASA to the Zenith 1 truss on the ISS.

The Avionics Wire Harness installed on the SASA Boom provides operational and heater power to the RFG.
Another function of the harness is to send command/status/RF signals to and from RFG.

SASA package was attached to the sidewall inside the payload bay of Atlantis during the ascent to the ISS.
It was transferred from the payload bay to the Zenith 1 truss for installation as a spare by spacewalkers Foreman and Satcher performing EVA 1 on November 19.
Atlantis delivered a repaired S-band Antenna Sub-Assembly (SASA) to the ISS which was returned to Earth during the STS-120 mission in October 2007. SASA is a space station antenna assembly consisting of
Assembly Contingency Radio Frequency Group (RFG or ACRFG)
SASA Boom
Avionics Wire Harness
Major functions of the ACRFG are to transmit/receive radio signals to/from the transponder, amplification of signals to a power level necessary to be acquired by a Tracking Data and Relay Satellite and to broadcast/receive signals through the selected antenna.
The SASA boom assembly consists of a mast, an extra-vehicular activity (EVA) handle, a harness, a connector panel, a mounting surface for the RFG and a baseplate fitting. The fitting will serve as the structural interface for mounting the SASA to the Zenith 1 truss on the ISS.
The Avionics Wire Harness installed on the SASA Boom provides operational and heater power to the RFG. Another function of the harness is to send command/status/RF signals to and from RFG.
SASA package was attached to the sidewall inside the payload bay of Atlantis during the ascent to the ISS. It was transferred from the payload bay to the Zenith 1 truss for installation as a spare by spacewalkers Foreman and Satcher performing EVA 1 on November 19.
STS-129