RBSPICE Van Allen Probes Mission Overarching Science Questions: RBSPICE Van Allen Probes SWG, Iowa City August 2013

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1 RBSPICE Van Allen Probes Mission Overarching Science Questions: Which physical processes produce radiation belt enhancement events? What are the dominant mechanisms for relativistic electron loss? How do ring current and other geomagnetic processes affect radiation belt behavior? RBSPICE makes key contributions to these science questions by determining: how space weather creates the storm-time ring current around Earth, and how that ring current supplies and supports the creation of the radiation belt populations Van Allen Probes SWG, Iowa City August 2013

2 RBSPICE Outline 1. RBSPICE Status 2. RBSPICE SOC Status 3. Instrument Performance and Cross Calibrations 4. AGU Presentations 5. Student Activities 6. Sample Science Activities

3 1. RBSPICE Status RBSPICE A and B: Energy system on both continues nominal operation. RBSPICE-A: Operating at HV=198. Perigee safing window: 3 hours 20 minutes total (1 hour 20 minutes pre-perigee; 2 hours post-perigee). Telemetry products configured for energy science during perigee safing window; full science elsewhere. RBSPICE-A experienced 5 HV alarms interspersed with 3 nominal orbits from 7/29-7/31, followed by 6 nominal orbits, then 3 HV alarms interspersed with 2 nominal orbits from 8/3-8/4. RBSPICE-B: Operating at HV=204 with no alarms. Perigee safing window: 1 hour 50 minutes total (55 minutes pre-perigee; 55 minutes post-perigee). Telemetry products are configured for energy science during the perigee safing window; full science elsewhere. 158 HV Alarms January-June 2013 Tom Sotirelis, JHUAPL

4 2. RBSPICE SOC Status (Jerry Manweiler, Fundamental Technologies)

5 RBSPICE A Product Production Status

6 RBSPICE B Product Production Status

7 RBSPICE A Production Status: March 2013

8 3. RBSPICE instrument performance and cross-calibrations (Don Mitchell, JHUAPL) Demonstration of RBSPICE-B oxygen measurement during a dispersed injection on July 20, Until this event, it has been difficult to verify RBSPICE s capability for measuring oxygen using the TOF x Pulse-Height technique, but is confirmation.

9 HOPE RBSPICE-B Hydrogen comparison (before 6.7 HOPE correction)

10 HOPE RBSPICE-B Hydrogen comparison (after 6.7 HOPE correction)

11 MagEIS RBSPICE-B Ion Comparison, Under Construction!

12 4. AGU Meeting 2013 (with RBSPICE co-authors; may not be complete) Gkioulidou et al., Role of ion injections in buildup of ring current pressure: A Van Allen Probes/RBSPICE study of the March 17, 2013 storm Ukhorskiy et al., Properties and origins of resonant patterns in the energy spectra of the inner belt electrons Armstrong and Manweiler, ACE observations of interplanetary particles and magnetic field: possible contributors to radiation belt populations measured by Van Allen Probes during major events in 2013 Brown et al., A demonstration of multi-mission analysis of charged particle data from Van Allen Probes and the JUNO Earth flyby Gerard and Lanzerotti, Helium ion characteristics during quiet and active solar conditions as measured by the Van Allen Probes RBSPICE instrument Kistler et al., Composition changes in the inner magnetosphere during a small storm (April 24-25, 2013) Manweiler et al., Details of RBSPICE SOC and data products Min et al., Energetic electron response to the March 1 [2013] storm: coordinated observations between Van Allen Probes and THEMIS spacecraft Patterson et al., Comparison of species-resolved energy spectra from ACE EPAM and Van Allen Probes RBSPICE Urban et al., Solar wind-driven ULF activity in Earth s inner radiation belt: Effects on trapped electrons Chen et al., Differentiating sudden loss mechanism of inner belt protons from multi-satellite observations

13 5. Student Activities Kyungguk Min: Ph.D. May 2013, NJIT. Post-doc, Auburn U. Several papers including two on fast calculation of L*; EMIC and chorus waves Paul Dupiano: M.S. student, NJIT, now employed in industry Analysis of ULF waves as seen in RBSPICE proton measurements Kevin Urban: Ph.D. student, NJIT Analysis of ground-based fluxgate magnetometer data in relation to ULF organization of inner radiation belt plasma Dhvanit Mehta: Ph.D. student, NJIT Analysis of localized particle precipitation and the generation of gravity waves in high latitude thermosphere

14 6. Sample Science Activities Matina Gkioulidou Ion injection and build up of pressure in the ring current

15 Gerrard He/H from s/c B 17 March 2013 CME event

16 Patterson and Armstrong Interplanetary ions as possible source(s) of magnetosphere ion populations

17 Kyungguk Min Electron acceleration and loss March 1, 2013 storm event

18 : SC A Gerrard Internal (to s/c) charging as measured by ERM Space weather effects on s/c subsystems CM 1 = 1mm Al (e > 0.7MeV) CM 2 = 3.8mm Al (e > 2MeV)

19 Urban Studies of ULF wave frequencies at foot points of RBSPICE and driving of particle distributions (videos also exist and are used)

20 Ukhorskiy Inner electron belt resonance patterns and modeling

21 Van Allen Probes SWG, Iowa City August 2013 RBSPICE on S/C A JHUAPL Clean Room