NASA THEMIS Mission Level 1 and 2 CDF DataEntry ID: THEMIS_L1_L2_DATA
Abstract: [Source: THEMIS Mission Home page at Space Sciences Laboratory, University of California, Berkeley, CA,
THEMIS answers longstanding fundamental questions concerning the nature of the substorm instabilities that abruptly and explosively release solar wind energy stored within the Earth’s magnetotail. The primary objectives of the mission are to
... 1. Establish when and where substorms begin
2. Determine how the individual components of the substorm interact
3. Determine how substorms power the aurora, and
4. Identify how local current disruption mechanisms couple to the more global substorm phenomena
THEMIS accomplishes these tasks by employing 5 identically-instrumented spacecraft in carefully chosen orbits whose apogees line up once every 4 days over a dedicated array of ground observatories located in Canada and the northern United States.
Three inner probes ~10 Earth radii (RE) from Earth monitor current disruption onset, while two outer probes at 20 and 30RE remotely monitor plasma acceleration due to lobe flux dissipation. Magnetic field lines map phenomena occurring at the inner spacecraft to the ground arrays, where they can be observed as nightside auroral displays and geomagnetic perturbations.
The array of spacecraft and ground observations will enable researchers to pinpoint when and where substorms begin, thereby distinguishing between models that begin with current disruption in the near-Earth magnetotail and those that begin with magnetic reconnection in the distant magnetotail. The same array of spacecraft and ground observatories permits researchers to link phenomena observed in the magnetotail to those observed in the ionosphere.
THEMIS employs flight-proven instruments and subsystems, yet demonstrates spacecraft design strategies ideal for Constellation class missions. THEMIS complements MMS and serves as a science and a technology pathfinder for future STP missions. THEMIS was launched on February 17, 2007.
Data Set Citation
Dataset Originator/Creator: NASA Contract NAS5-02099 and V. Angelopoulos
Dataset Title: NASA THEMIS Mission Level 1 and 2 CDF Data
Dataset Release Place: Space Sciences Laboratory, University of California, Berkeley
Dataset Publisher: NASA and SSL, BerkeleyOnline Resource: http://themis.ssl.berkeley.edu/roadrules.shtml
Start Date: 2007-02-18
SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > AURORAE
SUN-EARTH INTERACTIONS > SOLAR ENERGETIC PARTICLE FLUX > ELECTRON FLUX
SUN-EARTH INTERACTIONS > SOLAR ENERGETIC PARTICLE FLUX > ION FLUX
SUN-EARTH INTERACTIONS > SOLAR ENERGETIC PARTICLE PROPERTIES > TOTAL ELECTRON CONTENT
SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > ELECTRIC FIELDS/ELECTRIC CURRENTS
SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > MAGNETIC STORMS
Quality ATTRIBUTE ACCURACY REPORT: The accuracy of the attributes in this dataset is
LOGICAL CONSISTENCY REPORT: The data is believed to be logically consistent.
COMPLETENESS REPORT: This dataset is complete.
HORIZONTAL POSITIONAL ACCURACY REPORT: Unknown
VERTICAL POSITIONAL ACCURACY ... REPORT: none
PROCESS DESCRIPTION: Hurricane information was downloaded from the Purdue
historical hurricane site. The textual information was imported into Excel,
cleaned and saved as a .dbf file. This file was then converted to shapefiles
with attributes using a script in ARC/INFO 7.1.1. The shapefiles were
aggregated by decade and converted to shapefiles in ArcView 3.0a.
PROCESS DATE: 19971030
SOURCE INFORMATION - CITATION: National Hurricane Center. Atlantic Hurricane
Tracts. 1996. GEOSPATIAL DATA PRESENTATION FORM: map.
TYPE OF SOURCE MEDIA: unknown.
BEGINNING TIME: 1886.
ENDING TIME: 1996.
SOURCE CURRENTNESS REFERENCE: publication date.
SOURCE CITATION ABBREVIATION: h1960.
SOURCE CONTRIBUTION: Alabama Coastal Hazards Assessment CD product
Access Constraints ACCESS CONSTRAINTS: none
DISTRIBUTION LIABILITY: Users of this data must assume responsibility for
determining proper use. The distributors assume no liability for the data.
CUSTOM ORDER PROCESS: Contact NOAA Coastal Services Center's Clearinghouse
Manager and request a copy of the Alabam Coastal Hazards Assessment CD-Rom.
Alternatively, fill out a CSC Product Request Form at
Use Constraints unknown
Data Set Progress
Role: TECHNICAL CONTACT
Email: clearinghouse at csc.noaa.gov
2234 South Hobson Avenue
Province or State: SC
Postal Code: 29405-2413
Role: DIF AUTHOR
Email: csc at csc.noaa.gov
NOAA Coastal Services Center 2234 South Hobson Avenue
Province or State: SC
Postal Code: 29405-2413
Creation and Review Dates
DIF Creation Date: 1997-11-31
Last DIF Revision Date: 2012-02-23