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THEMIS in the RBSP, ERG, Orbitals era Vassilis Angelopoulos UCLA ESS/IGPP & SSL/UCB

THEMIS in the RBSP, ERG, Orbitals era Vassilis Angelopoulos UCLA ESS/IGPP & SSL/UCB. Introduction. From prime mission to extended mission. Need for correlative space measurements Use of tools to enhance science – the user perspective. P1 P2 P3 P4 P5. TH-B TH-C TH-D TH-E TH-A.

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THEMIS in the RBSP, ERG, Orbitals era Vassilis Angelopoulos UCLA ESS/IGPP & SSL/UCB

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  1. THEMIS in the RBSP, ERG, Orbitals era Vassilis Angelopoulos UCLA ESS/IGPP & SSL/UCB

  2. Introduction • From prime mission to extended mission. • Need for correlative space measurements • Use of tools to enhance science – the user perspective

  3. P1 P2 P3 P4 P5 TH-B TH-C TH-D TH-E TH-A 2007-03-23 2007-06-03 Launch=2007-02-17 YGSE 2007-07-15 XGSE 2007-08-30 2007-12-04 First 10 months: Commissioning andCoast Phase Observations

  4. TH-B TH-C TH-D TH-E TH-A P1 P2 P3 P4 P5 First year baseline orbit (FY08) YGSE Tail 12008-02-02 Dayside 12008-08-08 XGSE Second year baseline orbit (FY09) YGSE Dayside 22009-09-16 Tail 22009-02-18 XGSE

  5. THEMIS = THEMIS baseline + ARTEMIS Extended PhaseMission Concept, FY10 +

  6. P3,4,5 tail science FY10-12Continuing on the THEMIS legacy • Probes P3,4,5 in an Rq plane, never achieved before, measure: • Dipolarization fronts: dissipation, interaction, particle acceleration • Cross-tail and field aligned currents under finvariance (ideal 3-point tail constellation) • Tailward expansion speeds using timing, lateral expansion using finite gyroradius Y Z 2010-04-10 00:00:00 P5 P4 P3 X P3 X P4 P5

  7. Extended THEMIS (P3,P4,P5) • At the Magnetotail, Study: • Dipolarization fronts and currents • Dissipation of bursty fast flows • Result: • Ability to map and model keyinstability region • With first ever: • Simultaneous dR-dZ separations, 0.1-1RE • Clustered orbits study the 8-12RE region Z 2010-04-10 00:00:00 FAST P4 X X P3 P5 Y Courtesy: Pulkkinen and Wiltberger

  8. P3,4,5 dayside science (FY10-12)Dayside transients, reconnection • Probes P3,4,5 in an Rq plane, never achieved before, measure: • Magnetopause and field aligned currents under under finvariance (ideal 3-point dayside constellation) • Bracket reconnection site, measure inflow and outflow conditions 1st, 2nd, 3rdextended dayside Scales: 0.01-0.4RE, P3 out Z 2010-04-10 00:00:00 P4 P3 X P5

  9. [THEMISCoast PhaseMozer et al.GRL] Extended THEMIS (P3,P4,P5) • At Subsolar Magnetopause, study: • Asymmetric reconnection: dynamics, evolution and role of cold ions • Internal FTE structure and electron acceleration • Result: • Hall-physics of subsolar magneto-pause reconnection, paves way to MMS • Using novel: • Simultaneous dR-dZ separations at 0.1-0.5RE monitor inflow and outflow • Cluster-like separations at subsolar region 1st, 2nd, 3rdextended dayside Scales: 0.01-0.4RE, P3 out Z 2010-04-10 00:00:00 P4 P3 X P5

  10. P4 P3 P5 Extended THEMIS (FY12-14) • At Inner Magnetosphere, Study Role of: • ULF/VLF/EMIC waves on ion, electron energization/losses • Large electric fields on storm time ring current • Result: • Comprehensive AC waves and E-fields models • Using novel: • 0.1-2RE separations to resolvetemporal/spatial evolution of gradients • daily conjunctions: PFISR, S-DARN

  11. THEMIS separations in FY12-14 4-8-12 hrs and 8-8-8 hrs

  12. THEMIS+RBSP (FY12-14)

  13. Data Collection and Distribution THEMIS GMAG THEMIS ASI THEMIS PROBES NOAA (GOES,SPIDR) KYOTO (AE Index,Dst,Kp) Ancillary GMAG (MACCS,Carisma, Greenland, GIMA) SSL Ground calibration Software depository CDF and Cal. Files WWW NASA (CDA, SSC) MIRROR EUROPE MIRROR JAPAN MIRROR TAIWAN Researcher

  14. THEMIS Software • The main goal of the THEMIS software design is to provide researchers with tools to handle multiple missions, spacecraft, and instruments using the same interface. • THEMIS software is free and available at the mission web site • http://themis.ssl.berkeley.edu/software.shtml • The software is an IDL-based library of utilities • Platform independent – works on Windows, UNIX/Linux, MacOS • Crib sheets also provided • Two interfaces are available • Graphical User Interface • Command-line (based on TPLOT package). • Software enables users to: • Download raw L1 and/or calibrated L2 data • Data Analysis • Ingestion of data from other missions • Publication Quality Plots • Software distribution includes many functions written by community and is open for contributions.

  15. Crib Sheets • Crib sheets available for loading, processing and plotting THEMIS data • Effective format for exchange of ideas • Example: • thm_crib_fgm • IDL> thm_load_state, probe='a', /get_support_data thm_load_fgm, lev=1, probe=['a'], type='raw', suffix='_raw' thm_cal_fgm, probe=['a'], datatype='fg?', in_suffix='_raw', out_suffix='_ssl' tplot_options, 'title', 'THEMIS FGM Examples' tplot, ['tha_fgl_raw', 'tha_fgl_ssl']

  16. Substorm Example • Substorm evening combining OMNI, THEMIS, and GOES data.

  17. Magnetopause Crossing - 1

  18. Data Availability • All data are distributed to the entire community. Distribution by: • CDFs via web, IDL-based platform independent code, VxOs (THEMIS is SPASE compatible) • Data Level Definitions: • Level 0 Data – • Raw files (*.pkt) one per APID (Only used for loading ESA data) • Level 1 Data - • CDF (Common Data Files) files (*.cdf), contain raw, uncalibrated data. i.e. counts, DAC units. • Requires TDAS software to interpret. Calibration is done by default when Level 1 data is input. • Level 2 Data - • CDF files – contain physical quantities – TDAS software is not needed for interpretation. • Files for ESA, FBK, FIT, FGM, MOM*, SST – can be downloaded from SPDF. • Data products are validated by a responsible scientist (tohban) • Ensures quick problem finding and resolution • Trains new team members on the full dataset

  19. Data Availability to Community:Products Status • V5.00 Science Software/Data Availability Status Report (As of Fall 2009) • General Loads, introduces and calibrates all L1 quantities, all instruments Loads calibrated L2 quantities • STATE L1 STATE available since launch, V03 STATE (improved attitude and spin phase corrections) - Soon • FGM L1, L2 data available since early March 2007 • FIT / FFT / FBK - L1, L2 data available since early March 2007 • SCM L1 data available since early March 2007 L2 frequency spectrograms (FBK) available now L2 SCM data became available in summer 2009 • EFI All L1 data available from TH-C since May 2007, TH-D,E since Jun 7, 2007 L2 EFI available Fall 2009 • ESA No L1 data, only L0 data – however, read-in is transparent to user All data available since ESA turn-on, i.e., mid-March 2007 L2 omnidirectional energy spectrograms, ground moments available now • SST L1 data available since SST turn-on, mid-March 2007 L2 omnidirectional energy spectrograms available now • ASI L1 thumbnail images from 21 stations available. L1 full-resolution images available up to March 2009, Mosaics, movies for full mission • GMAG L2 cdf files with ground magnetometer data from 51 stations. (Includes ancillary: Greenland , Augsburg College). • Ancillary Daya Served • GOES – The GOES high-resolution (0.5s) magnetometer data is from GOES 10, 11 and 12 satellites from • September 2007–June 2008 for each satellite. Acknowledgement to Howard Singer at • NOAA Space Weather Prediction Center for the data. • ACE - The ACE data consists of magnetometer values in GSM coordinates with one minute averages • and Solar Wind Electron Proton Alpha Monitor data

  20. Data Processing and Community Support • All data/plots available, calibrated 1 day after downlink (http://sprg.ssl.berkeley.edu) • Routine data distribution in 4 ways • CDF downloads from SPDF, UCB, 4 mirror sites • HTTP and FTP socket connection through software (seemless) • Bundled downloads via UCB site (per instrument, spacecraft, product) • On-line at VMOs, and PDS and SPASE compatible. • Free, powerful software distribution, on-line docs, tutorials • IDL-based, platform independent • Community demos biannually at GEM meetings + trainings on demand • On-line Support (THEMIS_Science_Support@ssl.berkeley.edu) • SVN configuraton-controlled: distributed, grass-roots effort

  21. Summary • The data and software system provides familiar and standard interfaces to multiple missions and different science data sets. • Data is stored in the unified Common Data Format (CDF) in the distribution center and available via WWW. • THEMIS software is free, publicly available, platform independent, user friendly, and open for community contributions. • The system design philosophy is based on streamlining data and software distribution and exchange, thereby enhancing science productivity

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