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Space-to-Space Communication System (SSCS)

Problem: The current extravehicular activities (EVA) communications system on the Orbiter operates in the frequency band of 225 MHz to 400 MHz. Those frequencies are allocated for Department of Defense use only, and NASA has agreed to vacate that frequency band. In addition, the Orbiter and ISS programs have identified the need for a direct radio frequency (RF) link between the Orbiter and ISS for mating and demating operations.
Solution: The above requirements have culminated in the decision to develop the SSCS as an integrated system with radios supplied to all program elements by a single provider. A new frequency allocation in the 410 to 420 MHz band has been approved for SSCS. New hardware is being developed to operate in the new frequency band and meets all stated requirements. New hardware will be installed in the Orbiter, the ISS and the EMU.
Initial Operation Date: Date December 1998
Number of Shuttle mission STS-96
Technology Goal: The new SSCS uses the latest state of the art digital technology with up to five simultaneous users selected automatically.
Goals Supported: 1) Fly Safely
2) Meet the Manifest
3) Improve Supportability
4) Reduce Cost

Curator: Kim Dismukes | Responsible NASA Official: John Ira Petty | Updated: 04/07/2002
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