Abstract
ISACS-DOC (Intelligent SAtellite Control Software-DOCtor), which is automatic monitoring and diagnostic system for spacecraft, has been developed and operated at Institute of Space and Astronautical Science (ISAS) of Japan Aerospace Exploration Agency (JAXA). It aims to rapidly and accurately capture important changes and signals of anomaly during routine operations without the continuous presence of specialists. Three ISACS-DOC systems have been so far constructed for the features of deep or semi-deep space missions. Recently, ISAS launched three low-altitude earth orbiters in succession. Therefore, this paper presents overview and operation results of the newly developed monitoring and diagnostic systems for low-altitude earth orbiters different in various aspects from the deep space spacecraft targeted by the past ISACS-DOC systems.
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