© 2014 The Aerospace Corporation

RPS Operations: Status and Extended Mission Topics

J. Mazur, P. O’Brien, M. Looper, M. Redding, J. George, and B. Blake

The Aerospace Corporation

Space Science Applications Laboratory

joseph.mazur@aero.org

571-307-3915

23 September 2014

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RPS Health Summary

• Both instruments are fully functional with no performance issues

• Thermal management is nominal

• One occurrence of a fast glitch (<50nsec risetime) on RPS-A 1PPS line

– 4/26/2014 (day 605) at 0934Z

– Occurred at apogee (L=5.77, MLT=10.24) during a relatively weak outer zone enhancement

9/1/2011 to 9/1/2014

RPS-B

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RPS Extended Mission Items

• RPS measurement of total ionizing dose is an important contribution to questions about vehicle health

– ~6.7 rads per day behind 540 mils

– ~2.4 krads per year

• New operations mode option:– Modify coincidence to not require

triggers of back detectors

– The change would lower the incident energy requirement for protons from 60 MeV to ~30 MeV depending on the exact mode

– Would be done in campaign modes to provide a larger overlap between RPS and REPT

© 2014 The Aerospace Corporation