THEMIS Workshop 1 UC Berkeley, 18 December 2004

Data Products and Access

Tim Quinn

UC Berkeley

THEMIS Workshop 2 UC Berkeley, 18 December 2004

Dr. Fink Asks

What are the THEMIS data

products?

THEMIS Workshop 3 UC Berkeley, 18 December 2004

Data Products

THEMIS Workshop 4 UC Berkeley, 18 December 2004

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

THEMIS Workshop 5 UC Berkeley, 18 December 2004

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) DataKey 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

THEMIS Workshop 6 UC Berkeley, 18 December 2004

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

THEMIS Workshop 7 UC Berkeley, 18 December 2004

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

THEMIS Workshop 8 UC Berkeley, 18 December 2004

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

THEMIS Workshop 9 UC Berkeley, 18 December 2004

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