The International Space Station Alpha (ISSA) is a joint project between the United States, European Space Agency, Japan, Canada and Russia to develop and fly a space station in the later part of the 1990s. Each of these partners will contribute one or more pressurized modules or other elements to this new space station. The United States will be the largest hardware contributor to this project, and this paper will describe the avionics architecture for the U.S provided pressurized modules and truss segments. The avionics contained within these U.S. modules and segments will perform many of the core engineering and payload support functions for the ISSA. These functions include: the command and data handing, communications and tracking, guidance navigation and control (in partnership with the Russian elements), and electrical power generation and distribution.
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