ACE/EPAM Interplanetary Particles at L1 and RBSPICE Observations. Thomas P. Armstrong Fundamental Technologies, LLC August 12, 2013

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1 ACE/EPAM Interplanetary Particles at L1 and RBSPICE Observations Thomas P. Armstrong Fundamental Technologies, LLC August 12, 2013

2 Outline 1. Brief overview of 2012 from ACE illustrating available observations. 2. Question(s) motivating comparative studies. 3. Strategies to enable access and assure quality. 4. Useful links to acquire observations and characterizations thereof.

3 Channel # Name ACE EPAM Rate Channel Summary (2013) E low (kev) E high (kev) Geo. Fact. cm 2 sr Species 1 E1' e 2 E2' e 3 E3' e 4 E4' e 5 FP5' Z/=1 6 FP6' Z/=1 7 FP7' Z/=1 8 P1' Z/=1 9 P2' Z/=1 10 P3' Z/=1 11 P4' Z/=1 12 P5' Z/=1 13 P6' Z/=1 14 P7' Z/=1 15 P8' Z/=1 16 W Z=1 17 W Z=1 18 W Z=2 19 W Z=2 20 W Z=8 21 W Z=8 22 W Z=26 23 W Z=26 Channel # Name E low (kev) E high (kev) Geo. Fact. cm 2 Species sr 24 Z Z > 1 25 Z2A Z > Z Z > 4 27 Z Z > E e 29 E e 30 E e 31 E e 32 FP Z/=1 33 FP Z/=1 34 FP Z/=1 35 P Z/=1 36 P Z/=1 37 P Z/=1 38 P Z/=1 39 P Z/=1 40 P Z/=1 41 P Z/=1 42 P Z/=1 43 DE e 44 DE e 45 DE e 46 DE e Strikethroughs denote channels not working correctly at this time

4 Quick Reference Information on ACE/EPAM General Description link: Data files for download: Instrument details:

5 ACE/EPAM Digitized Event Analysis 1. Event by event pulse height analysis of DC(B) logic available in calibrated form at: 2. Species-resolved, PHA-derived, background corrected energy spectra at: 3. Species-grouped, PHA-derived Z=1, Z/=2, and electron low energy directional spectra, background corrected, expressed in spacecraft and solar wind rest frames at:

6 Resolvable Questions? 1. Does radiation of interplanetary origin arrive directly at Van Allen Probes orbit? a. Compositional signatures? (p/α, O/α) b. Spectral signatures (γ,e 0 ) c. Evidence of inward transport? d. Evidence of latitudinal transport? e. Temporal relationships

7 An early result that could be revisited Krimigis, et al, reported from INJUN IV observations of trapped radiation that the abundance of helium relative to protons (.01) at about 0.5 MeV/Nuc. was much lower than solar wind suggesting an ionospheric source. How much material at what energies derives from interplanetary source(s)? For an ionospheric source, exactly how and where is the trapped radiation energized?

8 1.0E+05 ACE EPAM Daily Averages P2' 68 to 115 kev protons 1.0E+04 Rate (Counts/Second) 1.0E E E E E E-02 12/26 12/6 11/16 10/27 10/7 9/17 8/28 8/8 7/19 6/29 6/9 5/20 4/30 4/10 3/21 3/1 2/10 1/21 1/1 Date (2012)

9 1.0E+03 ACE EPAM Daily Averages W1 521 to 1048 kev protons 1.0E+02 Rate (Counts/Second) 1.0E E E-01 12/26 12/6 11/16 10/27 10/7 9/17 8/28 8/8 7/19 6/29 6/9 5/20 4/30 4/10 3/21 3/1 2/10 1/21 1/1 Date (2012)

10 1.0E+03 ACE EPAM Daily Averages W to 1278 kev/nuc. Helium 1.0E+02 Rate (Counts/Second) 1.0E E E E E E-04 12/26 12/6 11/16 10/27 10/7 9/17 8/28 8/8 7/19 6/29 6/9 5/20 4/30 4/10 3/21 3/1 2/10 1/21 1/1 Date (2012)

13 ACE EPAM 12 Second Rates W1 W2 W3 W4 W5 Bmag 1.0E Date (Counyts/Second) 1.0E E E E E-02 18:00 2 0:00 6:00 SCET December 14-15, : :00

14 ACE EPAM 12 Second Rates DE1 DE2 DE3 DE4 Bmag 1.0E Date (Counts/Second) E E E+00 18:00 0:00 6:00 SCET December 14-15, : :00

15 1.0E+02 ACE EPAM 12 Second Rates W1 W2 W3 W4 Bmag 12.5 Rate (Counts/Second) 1.0E E B mag (nt) 1.0E-01 18:00 19:00 20:00 21:00 22:00 23:00 SCET December 14,

16 Approaches to correlative studies Develop, tabulate and distribute key parameters Distinguish between epochs of northward and southward IMF. Attempt to characterize causal connections from L1 to RBSPICE by studies of cross correlations vs time delay

17 Need major assistance from MIDL experts!! How do I extract or create a simple flat file of time ordered binned rates for protons, helium, and oxygen merged with spacecraft coordinates and pitch angles for RBSPICE A & B? Given links to existing ACE EPAM csv flat files of rates (fluxes can easily be obtained from spreadsheet arithmetic) what is the easiest way to compare with RBSPICE?

18 Time delays between ACE and 10 Re for solar wiund speed convected phenomena 1.0E+04 ACE EPAM 5 minute Averages E1' E1' MPA W1 W1_MPA The approximately 50 to 60 minute convection delay from L1 to 10 Re must clearly be taken into account in associating intensity features with Van Allen Probes observations.. 1.0E+03 Rate (Counts/Second) 1.0E E+01 18:00 0:00 6:00 12:00 Date March 16-17,2013

19 Editorial comment-- While I understand and am impressed with the huge amount of detail yielded by RBSPICE observations and the images that can be derived therefrom, inferences made from images (in my humble opinion) ultimately need to be supported by quantitative in addition to visual similarities.

20 That s all folks!

21 Print Group Data Mode Sensors Species Angular Res. Cadence Ref. Frame Data Type Units Filename (yy=year, yyyy=year,ddd=day of year) Description Subdirectories in Directory 65 LEMS30, 12 sec. ALAyyddd65.csv Spin-averaged count rates for all five /VHO/VEPO/ace_epam/rates/12sec/yyyy LEFS60, 65 5 min. AAV5Myyddd65.csv detectors (LEMS30, LEFS60, CA60, LEMS120, /VHO/VEPO/ace_epam/rates/5min/yyyy LEMS120, 65 Hourly AAV1Hyyddd65.csv LEFS150) in the spacecraft reference frame at LEFS150, /VHO/VEPO/ace_epam/rates/Hourly/yyyy 12-sec, 5 min., hourly and daily cadence. 65 CA60 Daily AAV1Dyyddd65.csv /VHO/VEPO/ace_epam/rates/Daily/yyyy sec. ALAyyddd66.csv /VHO/VEPO/ace_epam/rates/12sec/yyyy Sectored electron and ion count rates for 66 5 min. AAV5Myyddd66.csv /VHO/VEPO/ace_epam/rates/5min/yyyy LEFS60 in the spacecraft reference frame at 66 Hourly AAV1Hyyddd66.csv 12-sec, 5 min., hourly and daily cadence. /VHO/VEPO/ace_epam/rates/Hourly/yyyy 66 Daily AAV1Dyyddd66.csv /VHO/VEPO/ace_epam/rates/Daily/yyyy RATE LEFS60 LEMS120 ions, electrons ions spin-averaged sec. ALAyyddd67.csv /VHO/VEPO/ace_epam/rates/12sec/yyyy Sectored ion count rates for LEMS120 in the 67 5 min. AAV5Myyddd67.csv /VHO/VEPO/ace_epam/rates/5min/yyyy spacecraft reference frame at 12-sec, 5 min., 67 Hourly AAV1Hyyddd67.csv hourly and daily cadence. /VHO/VEPO/ace_epam/rates/Hourly/yyyy 67 Daily AAV1Dyyddd67.csv /VHO/VEPO/ace_epam/rates/Daily/yyyy CA60 ions 8-sectors sec. 5 min. Hourly ALAyyddd68.csv AAV5Myyddd68.csv AAV1Hyyddd68.csv Sectored species-grouped ion count rates the /VHO/VEPO/ace_epam/rates/12sec/yyyy WART channels of the CA60 detector (W1-8) /VHO/VEPO/ace_epam/rates/5min/yyyy in the spacecraft reference frame at 12-sec, 5 /VHO/VEPO/ace_epam/rates/Hourly/yyyy 68 Daily AAV1Dyyddd68.csv min., hourly and daily cadence. /VHO/VEPO/ace_epam/rates/Daily/yyyy Spacecraft rates counts/sec sec. ALAyyddd69.csv Sectored species-grouped ion count rates the /VHO/VEPO/ace_epam/rates/12sec/yyyy 69 5 min. AAV5Myyddd69.csv Z channels of the CA60 detector (Z2, Z2a, Z3, /VHO/VEPO/ace_epam/rates/5min/yyyy 69 Hourly AAV1Hyyddd69.csv Z4) in the spacecraft reference frame at 12- /VHO/VEPO/ace_epam/rates/Hourly/yyyy 69 Daily AAV1Dyyddd69.csv sec cadence. /VHO/VEPO/ace_epam/rates/Daily/yyyy sec. ALAyyddd70.csv /VHO/VEPO/ace_epam/rates/12sec/yyyy 70 5 min. AAV5Myyddd70.csv Sectored electron and ion count rates for /VHO/VEPO/ace_epam/rates/5min/yyyy LEFS150 in the spacecraft reference frame at 70 Hourly AAV1Hyyddd70.csv at 12-sec, 5 min., hourly and daily cadence. /VHO/VEPO/ace_epam/rates/Hourly/yyyy 70 Daily AAV1Dyyddd70.csv /VHO/VEPO/ace_epam/rates/Daily/yyyy LEFS150 LEMS30 ions ions, electrons sec. ALAyyddd71.csv /VHO/VEPO/ace_epam/rates/12sec/yyyy Sectored ion count rates for LEMS30 in the 71 5 min. AAV5Myyddd71.csv /VHO/VEPO/ace_epam/rates/5min/yyyy spacecraft reference frame at at 12-sec, 5 71 Hourly AAV1Hyyddd71.csv min., hourly and daily cadence. /VHO/VEPO/ace_epam/rates/Hourly/yyyy 71 Daily AAV1Dyyddd71.csv /VHO/VEPO/ace_epam/rates/Daily/yyyy ions 4-sectors sec. ALAyyddd72.csv /VHO/VEPO/ace_epam/rates/12sec/yyyy Sectored electron count rates for LEMS30 in 72 5 min. AAV5Myyddd72.csv /VHO/VEPO/ace_epam/rates/5min/yyyy the spacecraft reference frame at at 12-sec, 5 72 Hourly AAV1Hyyddd72.csv min., hourly and daily cadence. /VHO/VEPO/ace_epam/rates/Hourly/yyyy 72 Daily AAV1Dyyddd72.csv /VHO/VEPO/ace_epam/rates/Daily/yyyy sec. ALAyyddd73.csv Ephemeris (position of ACE, Earth, and /VHO/VEPO/ace_epam/rates/12sec/yyyy Jupiter,spin axis orientation, look directions of 73 5 min. AAV5Myyddd73.csv /VHO/VEPO/ace_epam/rates/5min/yyyy detector sectors, and tranformation matricies 73 Hourly AAV1Hyyddd73.csv between s/c coords, HEE, and RTN at at 12- /VHO/VEPO/ace_epam/rates/Hourly/yyyy 73 Daily AAV1Dyyddd73.csv sec, 5 min., hourly and daily cadence. /VHO/VEPO/ace_epam/rates/Daily/yyyy DE Ephemeris electrons N/A N/A positional various Note: Strikethroughs in sensor column indicate that flight performance is problematic. Do not use!

22 Data Mode Sensors Species Angular Res. Cadence Ref. Frame Data Type Units Filename (yy=year, yyyy=year,ddd=day of year) Description Subdirectories in Directory 17-min epam_mfsa_pg080_yyyy.csv Spin-avg. proton fluxes for detectors /VHO/VEPO/ace_epam/mfsa/PT17M/ Hourly epam_mfsa_pg080_yyyy_1h.csv (LEMS30, LEFS60, LEMS120, LEFS150) in the solar /VHO/VEPO/ace_epam/mfsa/PT1H/ Daily epam_mfsa_pg080_yyyy_1d.csv wind frame at 17-min hourly and daily cadence. LEMS30, LEFS60, LEMS120, LEFS min epam_mfsa_pg081_yyyy.csv Spin-avg. ion (Z>1) fluxes detectors /VHO/VEPO/ace_epam/mfsa/PT17M/ Hourly epam_mfsa_pg081_yyyy_1h.csv (LEMS30, LEFS60, LEMS120, LEFS150) in the solar /VHO/VEPO/ace_epam/mfsa/PT1H/ Daily epam_mfsa_pg081_yyyy_1d.csv wind frame at 17-min., hourly and daily cadence. electrons 17-min epam_mfsa_pg082_yyyy.csv Spin-averaged electron fluxes for LEFS60 and /VHO/VEPO/ace_epam/mfsa/PT17M/ Hourly epam_mfsa_pg082_yyyy_1h.csv LEFS150 in the solar wind frame 17-min hourly /VHO/VEPO/ace_epam/mfsa/PT1H/ Daily epam_mfsa_pg082_yyyy_1d.csv and daily cadence. LEMS30 protons Z>-1 17-min epam_mfsa_pg083_yyyy.csv Sectored proton fluxes for the LEMS30 detector in /VHO/VEPO/ace_epam/mfsa/PT17M/ Hourly Daily epam_mfsa_pg083_yyyy_1h.csv epam_mfsa_pg083_yyyy_1d.csv the solar wind frame at 17-min hourly and daily cadence. /VHO/VEPO/ace_epam/mfsa/PT1H/ protons spin-averaged 4-sectors 17-min epam_mfsa_pg084_yyyy.csv Sectored proton fluxes for the LEFS60 detector in /VHO/VEPO/ace_epam/mfsa/PT17M/ Hourly Daily epam_mfsa_pg084_yyyy_1h.csv epam_mfsa_pg084_yyyy_1d.csv the solar wind frame at 17-min hourly and daily cadence. /VHO/VEPO/ace_epam/mfsa/PT1H/ LEFS60 LEMS120 8-sectors 8-sectors Solar Wind number flux 1/(sec-cm^2-str-keV/nuc) 17-min Hourly epam_mfsa_pg085_yyyy.csv epam_mfsa_pg085_yyyy_1h.csv Sectored proton fluxes for the LEMS120 detector /VHO/VEPO/ace_epam/mfsa/PT17M/ in the solar wind frame at 17-min hourly and daily /VHO/VEPO/ace_epam/mfsa/PT1H/ Daily epam_mfsa_pg085_yyyy_1d.csv cadence. 17-min epam_mfsa_pg086_yyyy.csv Sectored proton fluxes for the LEFS150 detector in /VHO/VEPO/ace_epam/mfsa/PT17M/ Hourly Daily epam_mfsa_pg086_yyyy_1h.csv epam_mfsa_pg086_yyyy_1d.csv the solar wind rest frame at 17-min hourly and daily cadence. /VHO/VEPO/ace_epam/mfsa/PT1H/ LEFS150 4-sectors 17-min Hourly epam_mfsa_pg087_yyyy.csv epam_mfsa_pg087_yyyy_1h.csv Sectored Z>1 ion fluxes for the LEMS30 detector /VHO/VEPO/ace_epam/mfsa/PT17M/ in the solar wind rest frame at 17-min hourly and /VHO/VEPO/ace_epam/mfsa/PT1H/ Daily epam_mfsa_pg087_yyyy_1d.csv daily cadence. LEMS30 LEFS60 Z>1 4-sectors 17-min epam_mfsa_pg088_yyyy.csv Sectored Z>1 ion fluxes for the LEFS60 detector in /VHO/VEPO/ace_epam/mfsa/PT17M/ Hourly Daily epam_mfsa_pg088_yyyy_1h.csv epam_mfsa_pg088_yyyy_1d.csv the solar wind frame at 17-min hourly and daily cadence. /VHO/VEPO/ace_epam/mfsa/PT1H/ LEMS120 8-sectors 17-min Hourly epam_mfsa_pg089_yyyy.csv epam_mfsa_pg089_yyyy_1h.csv Sectored Z>1 ion fluxes for the LEMS120 detector /VHO/VEPO/ace_epam/mfsa/PT17M/ in the solar wind frame at 17-min hourly and daily /VHO/VEPO/ace_epam/mfsa/PT1H/ Daily epam_mfsa_pg089_yyyy_1d.csv cadence. LEFS150 8-sectors 17-min Hourly epam_mfsa_pg090_yyyy.csv epam_mfsa_pg090_yyyy_1h.csv Sectored Z>1 ion fluxes for the LEFS150 detector /VHO/VEPO/ace_epam/mfsa/PT17M/ in the solar wind frame at 17-min hourly and daily /VHO/VEPO/ace_epam/mfsa/PT1H/ Daily epam_mfsa_pg090_yyyy_1d.csv cadence. 4-sectors Note: Strikethroughs in sensor column indicate that flight performance is problematic. Do not use!

23 Data Mode Sensors Species Angular Res. Cadence Ref. Frame Data Type Units Filename (yy=year, yyyy=year,ddd=day of year) Description Subdirectories in Directory 17-min Hourly epam_mfsa_pg100_yyyy.csv epam_mfsa_pg100_yyyy_1h.csv Sectored Z>1 ion fluxes for the LEMS30 detector /VHO/VEPO/ace_epam/mfsa/PT17M/ in the spacecraft rest frame at 17-min hourly and /VHO/VEPO/ace_epam/mfsa/PT1H/ Daily epam_mfsa_pg100_yyyy_1d.csv daily cadence. LEMS30 LEFS60 Z>1 17-min epam_mfsa_pg101_yyyy.csv Sectored Z>1 ion fluxes for the LEFS60 detector in /VHO/VEPO/ace_epam/mfsa/PT17M/ Hourly Daily epam_mfsa_pg101_yyyy_1h.csv epam_mfsa_pg101_yyyy_1d.csv the spacecraft rest frame at 17-min hourly and daily cadence. /VHO/VEPO/ace_epam/mfsa/PT1H/ LEMS120 Z>1 Z>1 8-sectors 17-min epam_mfsa_pg102_yyyy.csv Sectored Z>1 ion fluxes for the LEMS120 detector /VHO/VEPO/ace_epam/mfsa/PT17M/ Hourly epam_mfsa_pg102_yyyy_1h.csv in the spacecraft rest frame at 17-min hourly and /VHO/VEPO/ace_epam/mfsa/PT1H/ Daily epam_mfsa_pg102_yyyy_1d.csv daily cadence. 17-min Hourly epam_mfsa_pg103_yyyy.csv epam_mfsa_pg103_yyyy_1h.csv Sectored Z>1 ion fluxes for the LEFS150 detector /VHO/VEPO/ace_epam/mfsa/PT17M/ in the spacecraft rest frame at 17-min hourly and /VHO/VEPO/ace_epam/mfsa/PT1H/ Daily epam_mfsa_pg103_yyyy_1d.csv daily cadence. LEFS150 LEFS60 Z>1 electrons 4-sectors 17-min Hourly epam_mfsa_pg104_yyyy.csv epam_mfsa_pg104_yyyy_1h.csv Sectored electron fluxes for the LEFS60 detector /VHO/VEPO/ace_epam/mfsa/PT17M/ in the spacecraft rest frame at 17-min hourly and /VHO/VEPO/ace_epam/mfsa/PT1H/ Daily epam_mfsa_pg104_yyyy_1d.csv daily cadence. LEFS150 8-sectors 17-min epam_mfsa_pg105_yyyy.csv Sectored electron fluxes for the LEFS150 detector /VHO/VEPO/ace_epam/mfsa/PT17M/ Hourly epam_mfsa_pg105_yyyy_1h.csv in the spacecraft rest frame at 17-min hourly and /VHO/VEPO/ace_epam/mfsa/PT1H/ Daily epam_mfsa_pg105_yyyy_1d.csv daily cadence. 4-sectors Hourly epam_bkgr_mfsa_pg106_yyyy_1h.csv Sectored GCR bkg. counts in LEMS30 determined /VHO/VEPO/ace_epam/backgrounds/ Daily epam_bkgr_mfsa_pg106_yyyy_1d.csv by the SIS detector at hourly and daily cadence. /VHO/VEPO/ace_epam/backgrounds/ LEMS30 LEFS60 background 4-sector Hourly epam_bkgr_mfsa_pg107_yyyy_1h.csv Sectored GCR bkg. counts in LEFS60 determined /VHO/VEPO/ace_epam/backgrounds/ Daily epam_bkgr_mfsa_pg107_yyyy_1d.csv by the SIS detector at hourly and daily cadence. /VHO/VEPO/ace_epam/backgrounds/ LEMS120 8-sector Hourly epam_bkgr_mfsa_pg108_yyyy_1h.csv Sectored GCR bkg. counts in LMS120 determined /VHO/VEPO/ace_epam/backgrounds/ Daily epam_bkgr_mfsa_pg108_yyyy_1d.csv by the SIS detector at hourly and daily cadence. /VHO/VEPO/ace_epam/backgrounds/ 8-sector Hourly epam_bkgr_mfsa_pg109_yyyy_1h.csv Sectored GCR bkg. counts in LEFS150 determined /VHO/VEPO/ace_epam/backgrounds/ Daily epam_bkgr_mfsa_pg109_yyyy_1d.csv by the SIS detector at hourly and daily cadence. /VHO/VEPO/ace_epam/backgrounds/ LEFS150 LEMS30 4-sector spin-averaged N/A rates counts/sec Hourly epam_bkgr_mfsa_pg110_yyyy_1h.csv Spin-avg. GCR bkg. counts in LEMS30 from the SIS /VHO/VEPO/ace_epam/backgrounds/ Daily epam_bkgr_mfsa_pg110_yyyy_1d.csv detector at hourly and daily cadence. /VHO/VEPO/ace_epam/backgrounds/ Hourly epam_bkgr_mfsa_pg111_yyyy_1h.csv Spin-avg. GCR bkg. counts in LEFS60 from the SIS /VHO/VEPO/ace_epam/backgrounds/ Daily epam_bkgr_mfsa_pg111_yyyy_1d.csv detector at hourly and daily cadence. /VHO/VEPO/ace_epam/backgrounds/ LEFS60 Hourly epam_bkgr_mfsa_pg112_yyyy_1h.csv Spin-avg. GCR bkg. counts in LEMS120 from the /VHO/VEPO/ace_epam/backgrounds/ Daily epam_bkgr_mfsa_pg112_yyyy_1d.csv SIS detector at hourly and daily cadence. /VHO/VEPO/ace_epam/backgrounds/ LEMS120 Hourly epam_bkgr_mfsa_pg113_yyyy_1h.csv Spin-avg. GCR bkg. counts in LEFS150 from the SIS /VHO/VEPO/ace_epam/backgrounds/ Daily epam_bkgr_mfsa_pg113_yyyy_1d.csv detector at hourly and daily cadence. /VHO/VEPO/ace_epam/backgrounds/ LEFS150 Note: Strikethroughs in sensor column indicate that flight performance is problematic. Do not use!

24 Data Mode Sensors Species Angular Res. Cadence Ref. Frame Data Type Units Filename (yy=year, yyyy=year,ddd=day of year) Description Subdirectories in Directory PHA CA60 ions 8-sector daily dexe kev pha_events_yyyy-ddd.zip PHA C & D energies, triggering WART channel, sector, and energy deposited. /VHO/VEPO/ace_epam/pha/events/ PHA CA60 ions 8-sector daily rates c./sec pha_rates_yyyy-ddd.zip Synchronously accumulated WART rates during the PHA cycle. /VHO/VEPO/ace_epam/pha/rates/ PHA CA60 Z>1 spinavg. daily Spacecraft counts / number flux (sec-cm 2 -srkev/nuc) -1 epam_pha_spectra_yyyy_1d.csv High resolved energy spectra integrated over a 1- day period for He, C, O, Ne, Si, and Fe. Duty cycle /VHO/VEPO/ace_epam/pha/spectra/ corrected accumulation time, counts, and flux are included. PHA CA60 Z>1 spinavg. Bartels counts / number flux (sec-cm 2 -srkev/nuc) -1 epam_pha_spectra_bartels.csv High resolved energy spectra integrated over a Bartels rotation for He, C, O, Ne, Si, and Fe. Duty cycle corrected accumulation time, counts, and flux are included. /VHO/VEPO/ace_epam/pha/spectra/

27 Comparison of Helium and Oxygen Spectra for March 2013 Event Helium Spectra Oxygen Spectra 1.0E Mar 16-Mar 17-Mar 18-Mar 19-Mar 20-Mar 1.0E Mar 16-Mar 17-Mar 18-Mar 19-Mar 20-Mar 1.0E E+00 Flux (counts/sec-cm 2 -str-mev/nuc) 1.0E E-01 Flux (counts/sec-cm 2 -str-mev/nuc) 1.0E E E E E E E E+01 Energy (MeV/nuc) 1.0E E E E+01 Energy (MeV/nuc)

28 Comparison of Helium and Oxygen Spectra for May 2013 Event Helium Spectra Oxygen Spectra 1.0E May 22-May 23-May 24-May 25-May 26-May 1.0E May 22-May 23-May 24-May 25-May 26-May 1.0E E+00 Flux (counts/sec-cm 2 -str-mev/nuc) 1.0E E-01 Flux (counts/sec-cm 2 -str-mev/nuc) 1.0E E E E E E E E+01 Energy (MeV/nuc) 1.0E E E E+01 Energy (MeV/nuc)

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

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