Environmental On-Orbit Anomaly Correlation Efforts at Hughes

Details Environmental On-Orbit Anomaly Correlation Efforts at Hughes Environmental On-Orbit Anomaly Correlation Efforts at Hughes

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998sct..conf..227b&link_type=abstract

Proceedings of the 6th Spacecraft Charging Conference. November 2-6, 1998. AFRL Science Center, Hanscom AFB, MA, USA., p.227-230

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Scientific paper

On-orbit spacecraft anomalies are relatively infrequent occurrences on modern satellite systems. However, the severity of these anomalies can vary dramatically, ranging from the corruption of telemetry data to the loss of an entire spacecraft. It is the dire consequences of a major anomaly which focus so much attention on anomalous on-orbit events. An environmental cause is often suspected for many of the observed anomalies, but it is quite difficult to conclusively demonstrate such a link. Limited data and limited resources complicate the investigation, making it almost impossible to identify a single root cause. The large Hughes commercial satellite fleet affords a unique opportunity to develop meaningful statistics regarding repeated anomalies. A close examination of the Hughes anomaly database has made it possible to identify certain patterns and trends that would not be discernible with a smaller sample set. A correlation technique has been developed which makes it possible to definitively isolate an environmental relationship for a given class of anomalies. This technique has been utilized to identify those anomalies which are generated by the high energy electron (deep charging) environment, and thus focus product improvement and corrective action efforts in a more constructive manner.

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