Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm33a0341k&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SM33A-0341
Physics
2774 Radiation Belts, 2794 Instruments And Techniques, 7984 Space Radiation Environment
Scientific paper
From June 2000 through July 2006, the Tri-Service Experiment Mission 5 (TSX-5) satellite has operated in a 410 x 1750 km/69° inclination orbit. The TSX-5 payload included the Compact Environmental Anomaly Sensor (CEASE), sponsored by the United States Air Force Research Laboratory. CEASE is a small (10 cm x 10 cm x 8 cm), low power (1.5W), low mass (1 kg) instrument designed to monitor the local space radiation environment and autonomously generate warnings of radiation damage, dielectric charging, and single event effects (SEE) to the host spacecraft. CEASE includes five solid state detectors (SSDs)--two independent dosimeters, a two-element energetic particle telescope, and an SEE detector. The spacecraft's high inclination and elliptical orbit resulted in more than six years of CEASE operation and data gathering in the portions of the inner and outer trapped radiation belts and auroral zone. The six year mission provided an extensive testing and validation of CEASE's concept and design. The instrument's standard telemetry output, designed for spacecraft ground operators, provided continuous measurements of particle fluxes in six dosimeter channels, three integral proton and three integral electron channels, one SEE counter, and eight warning flags. Ground processing of the telescope data allowed identification of incident particle type and energy, from which were determined integral proton and electron fluxes. Over CEASE's six year operating lifetime the instrument's dosimeters measured total doses of over 22 krad(Si) and over 14 krad(Si) behind 0.2 cm (80 mil) and 0.63 cm (250 mil) Al shields, respectively. Data from CEASE's SEE detector correlated with 122 anomalies in the spacecraft Fiber Optic Gyro which provided data to the attitude control system. Summary plots of 1 MeV electrons and greater than 35 MeV protons will be presented as well as high resolution plots of significant storms that occurred throughout the six year mission.
Dichter Bronislaw K.
Golightly Michael J.
Knorring C. L.
Ray Pallav Kumar
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