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The TSS‐1R Mission: Overview and scientific context

The Tethered Satellite System (TSS) program is a binational collaboration between NASA and the Italian Space Agency (ASI) with NASA providing the Shuttle‐based deployer and tether and ASI providing a satellite especially designed for tethered deployment. Twelve science investigations (see Table 1) were supported by NASA, ASI, or the Air Force Philips Laboratory. The goals of the TSS‐IR mission, which was the second flight of the TSS hardware, were to provide unique opportunities to explore (1) certain space plasma‐electrodynamic processes—particularly those involved in the generation of ionospheric currents, and (2) the orbital mechanics of a gravity‐gradient stabilized system of two satellites linked by a long conducting tether.