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Data Products and Access

Explore the various data products available from THEMIS mission such as 24-hour probe data, GMAG data, key parameters, and access methods for data analysis.

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Data Products and Access

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  1. Data Products and Access Tim Quinn UC Berkeley

  2. Dr. Fink Asks What are the THEMIS data products?

  3. Data Products

  4. Data Products • Probe 24 Hour Data File • Sorted by packet • Time ordered • Contain all engineering and science data (slow/fast survey, burst) at highest temporal resolution • Particle moments and distribution, and field quantities are obtained by converting raw data into physical units using calibration file • GBO All Sky Imager (ASI) Data • Image thumbnails • Raw image frames • Calibration files • Keogram summary plots • Composite global views

  5. Data Products • GBO Ground Magnetometer (GMAG) Data • Raw vector data • Calibration files • Processed data • Auroral Electrojet Indices • E/PO GMAG • Same as GBO GMAG • Key Parameter (Browse) Data Key parameter data is designed for monitoring the large scale particle and field dynamics and for selecting time periods of interest: • Keograms (GBO image data overview) • Auroral Jet Indices

  6. Data Products • Key Parameter (Browse) Data, Cont’d, • Probe overviews • 3-D magnetic field, DC waveforms and AC spectrograms • 3-D electric field, DC waveforms and AC spectrograms • Core (10eV-40 keV) ion density and velocity moments, temperature and pressure tensor, energy spectrogram • Core (5 eV-30 keV) electron temperature and pressure tensor, energy spectrogram • Energetic ion and electron fluxes • Indications when burst data has been collected • Mission Overview

  7. Timeline • GBO thumbnails available ~5min • Raw and processed GMAG data available ~1day • Inclusion in Key Paramter data ~1day • Recovery of full resolution image ~6 months

  8. Data Access • Data access methods: • Download from WWW • Query driven by date, site, instrument • Multiple Sites • UCB: All data and products • UCalgary: Image data and products • UCLA: GMAG data and products • UAlberta: Canadian GMAG data • NASA: Key Parameter Data • Download via TCP/IP (sftp, scp, etc.) using THEMIS data analysis software • Query driven……. • Direct access from local hard drive using THEMIS data analysis software • Query driven…….. • Download from DVD • Query driven…….. • Multicast (PGM) distribution group

  9. Data Analysis • UCBerkeley Software Package • Extensive library of IDL programs • Single probe analysis software (FAST and WIND) • Multi-point data analysis software (ISTP and CLUSTER_II) • Ancillary Data Software • Event Modeling • Science Data Tool (SDT) developed at SSL to analyze data from FAST, WIND, CLUSTER_II, and POLAR • ASI and GMAG tools • Distributed to Co-I’s and guest investigators and available on website • Training sessions at UCB

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