Abstract
The Unconventional Stellar Aspect (USA) experiment is a multi-purpose experiment built around an X-ray sensor viewing celestial sources. The objectives include both basic research in X-ray Astronomy and the systematic exploration of certain applied uses of X-ray sensors in space. The applied uses depend in large part upon exploiting understanding of celestial X-ray sources accumulated through research. A further feature is that the experiment includes a testbed devoted to the study of methods for reliable cm puting in space. The experiment was launched from Vandenberg AFB, CA aboard the Advanced Research and Global Observation Satellite (ARGOS). The ARGOS launch occurred on 23 February 1999. ARGOS is in a sun synchronous, circular orbit at 830 km altitude. The experiment was initialized in April 1999. It consists of a pair of proportional counters mounted in a two-axis gimbal for offset pointing from the nadir-pointed ARGOS. We will present an overview of the experiment, discuss its science goals, and present an overview of results from the experiment.
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