File:STS-134 S-Band Antenna Support Assembly.jpg

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Summary

Description	English: S-Band Antenna Support Assembly. The S-band Antenna Support Assembly (SASA) is an assembly that consists of the Assembly Contingency Radio Frequency Group (RFG, or ACRFG), SASA Boom and Avionics Wire Harness. The SASA supports the RFG in each of the two redundant strings of S-Band hardware on the Port 1 (P1) and Starboard 1 (S1) trusses. The major functions of the RFG are to receive a modulated radio signal from the S-band Transponder, amplify it to a power level necessary to be acquired by the Tracking Data and Relay Satellite (TDRS), and broadcast that signal through the selected antenna. Also, the RFG receives a signal from the TDRS through the antenna, amplifies it, and sends it to the Transponder for demodulation. The RFG consists of three units: the Assembly/ Contingency (S-Band) Transmitter/Receiver Assembly (ACTRA), a High Gain Antenna (HGA), and a Low Gain Antenna (LGA).
Date	22 April 2011
Source	http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html Document page: 38 (PDF page: 42)
Author	NASA/holmgrar

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	15:20, 25 April 2011		1,226 × 808 (168 KB)	Ras67	{{Information \|Description ={{en\|1=S-Band Antenna Support Assembly.<br /> The S-band Antenna Support Assembly (SASA) is an assembly that consists of the Assembly Contingency Radio Frequency Group (RFG, or ACRFG), SASA Boom and Avionics Wire Harness.<br

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Orbital replacement unit

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File:STS-134 S-Band Antenna Support Assembly.jpg

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22 April 2011

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