Abstract-The Space Technology 8 (ST8) mission is the latest in NASA's New Millennium Program technology demonstration missions. ST8 includes a spacecraft bus built by industry, flying four new technology payloads in lowEarth orbit. This paper will describe each payload, along with a brief description of the mission and spacecraft. The payloads include a miniature loop heat pipe intended to save mass and power on future small satellites, designed and built by NASA's Goddard Space Flight Center; a lightweight, 35g/m linear mass, 40-m deployable boom intended as a future solar sail mast built by ATK Space Systems; a deployable, lightweight Ultraflex solar array producing 175W/kg, also built by ATK Space Systems; and a high-speed, parallel-processing computer system built of state-of-the-art COTS processors, demonstrating SEU tolerance without the need for radiation-hardened electronics, and 100M operations per second per Watt processing throughput density.

This paper describes the evolution of telecommunication systems at Mars. It reviews the telecommunications capabilities, technology and limiting factors of current and planned Mars orbiters from Mars Global Surveyor to the planned Mars Telecommunications Orbiter (MTO).

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