Space Weather Conditions at the Time of the Galaxy 15 Spacecraft Anomaly (Invited)

Details Space Weather Conditions at the Time of the Galaxy 15 Spacecraft Anomaly (Invited) Space Weather Conditions at the Time of the Galaxy 15 Spacecraft Anomaly (Invited)

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh31d..03d&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SH31D-03

Mathematics

Logic

[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7807] Space Plasma Physics / Charged Particle Motion And Acceleration, [7934] Space Weather / Impacts On Technological Systems

Scientific paper

Space environmental conditions at the time of the Galaxy 15 satellite anomaly on 05 April 2010 are reviewed and discussed. Reports released by the system owner, Intelsat, indicate that at 09:48 UTC this geosynchronous communications satellite stopped responding to ground commands. The satellite manufacturer, Orbital Sciences, subsequently noted that the anomaly was the likely result of an “unusually violent solar activity that week that damaged the spacecraft’s ability to communicate with ground controllers". At the time of the anomaly, the geosynchronous satellite was located just past local midnight having recently come out of eclipse into a disturbed local space environment at GEO. Information sources contributing to an overall assessment of space weather conditions at this time include solar and interplanetary imagery and datasets, geosynchronous satellite particle and field measurements, observations from satellites in polar low-earth orbit, and ground-based magnetic observatory records. Initial analysis indicates that the Galaxy 15 anomaly occurred shortly after the start of a modest geomagnetic storm with a timely magnetic substorm that greatly perturbed the local space environment in the midnight sector. The intent of this presentation is to describe the space environmental conditions both globally and in close proximity to Galaxy 15 to facilitate ongoing spacecraft anomaly studies. Galaxy 15 (133 W) Anomaly 0948 UT on 05 April 2010

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