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- [Text from NASA's THEMIS home page
http://www.nasa.gov/mission_pages/themis/spacecraft/SCM.html ]
The Search Coil Magnetometer (SCM) measures low frequency magnetic field fluctuations and waves in three directions (tri-axial) in the Earth’s magnetosphere. Scientists believe that low frequency magnetic fluctuations and waves play an important role in triggering substorms. Frequencies of the waves range from several octaves below the lowest key on the piano (0.1 Hz) up to the top key on the piano (4 kHz). The SCM will measure this range to identify the instability that triggers substorms. Data from the SCM will be especially important in studying the waves in the “current disruption region” about 10 Earth Radii away from Earth in the magnetotail plasma sheet, as well as at larger distances where neutral lines are expected to form. Together with the other instruments of the THEMIS suite, the SCM will reveal the link between waves and the location(s) where substorms begin, thereby identifying the basic substorm mechanism.
Group: Instrument_Details
Entry_ID: SCM
Group: Instrument_Identification
Instrument_Category: Solar/Space Observing Instruments
Instrument_Class: Magnetic Field/Electric Field Instruments
Short_Name: SCM
Long_Name: SEARCH COIL MAGNETOMETERS
End_Group
Group: Associated_Platforms
Short_Name: THEMIS
End_Group
Online_Resource: http://www.nasa.gov/mission_pages/themis/spacecraft/SCM.html
Online_Resource: http://themis.ssl.berkeley.edu/instrument_scm.shtml
Sample_Image: http://www.nasa.gov/images/content/168039main_SCM_ETU_1_med.jpg
Creation_Date: 2008-07-18
Group: Instrument_Logistics
Instrument_Owner: CETP (France)
Instrument_Owner: NASA (USA)
End_Group
End_Group
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