Changes between Version 7 and Version 8 of TBR/UserApp/Magnetospheric_MultiScale


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Timestamp:
Mar 25, 2011, 11:12:59 PM (9 years ago)
Author:
JoelSherrill
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  • TBR/UserApp/Magnetospheric_MultiScale

    v7 v8  
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    8 The [wiki:Magnectorspheric_MultiScale_Mission Magnectorspheric MultiScale Mission] (MMS) is a Solar-Terrestrial Probe mission consisting of four identically instrumented spacecraft.  The goal is that the spacecraft will use the Earth’s magnetosphere as a laboratory to study the microphysics of three fundamental plasma processes: [wiki:Magnetic_reconnection magnetic reconnection] (Magnetic reconnection is the fundamental mechanism by which magnetic energy is dissipated.), energetic particle acceleration, and turbulence.  The four MMS spacecraft are being developed at NASA’s [wiki:Goddard_Space_Flight_Center Goddard Space Flight Center].  The mission is set to launch August 14, 2014.   
     8The [http://www.rtems.org/wiki/index.php/Magnetospheric_MultiScale Magnectorspheric MultiScale Mission] (MMS) is a Solar-Terrestrial Probe mission consisting of four identically instrumented spacecraft.  The goal is that the spacecraft will use the Earth’s magnetosphere as a laboratory to study the microphysics of three fundamental plasma processes: [http://en.wikipedia.org/wiki/Magnetic_reconnection magnetic reconnection] (Magnetic reconnection is the fundamental mechanism by which magnetic energy is dissipated.), energetic particle acceleration, and turbulence.  The four MMS spacecraft are being developed at NASA’s [http://en.wikipedia.org/wiki/Goddard_Space_Flight_Center Goddard Space Flight Center].  The mission is set to launch August 14, 2014.   
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    1010[wiki:File:MMSposter-small.jpg left]
     
    2323=  Proposed Payload  =
    2424
    25 Proposed Payload:
     25
    2626The SMART payload comprises three instrument groups: Hot Plasma, Energetic Particles, and Fields.  In addition, the payload includes two Active Spacecraft Potential Control Devices (ASPOC) and a Central Instrument Data Processor (CIDP).
    2727[[Image(Payload-deck-400.jpg)]]
    28 [[BR]]
    29 <p>
     28
     29
    3030'''Instrument description:'''
    31 </p>
    32 <p>
     31
    3332'''Hot Plasma'''
    3433 * Fast Plasma Instrument (FPI): The FPI consists of Dual Ion Sensors and Dual Electron Sensors and measures 3D ion and electron flux distributions over the energy range ~10 eV to 30 keV with an energy resolution of 20%. Electrons will be measured with a time resolution of 30 ms, ions with a time resolution 150 ms. FPI development is led by Co-I T. E. Moore (GSFC).
    3534 * Hot Plasma Composition Analyzer (HPCA): The HPCA employs a novel RF technique to measure minor ions such as oxygen and helium in regions of high flux. Energy range = ~10 eV to 30 keV; energy resolution = 20%; time resoluton = 15 s. HPCA development is led by Co-I D. T. Young (SwRI).
    36 </p>
    37 <p>
     35
     36
    3837'''Energetic Particles'''
    3938 * Fly's Eye Energetic Particle Sensor (FEEPS): The two FEEPS will measure 3D energetic ion and electron flux distributions over the energy ranges ~25 keV to 500 keV (electrons) and ~45 keV to 500 keV (ions). Time resolution = 10 s. FEEPS development is led by Co-I J. B. Blake (Aerospace Corporation).
    4039 * Energetic Ion Spectrometer (EIS): EIS uses a time-of-flight/pulse-height sensor to provide ion composition measurements (protons vs. oxygen ions) and angular distributions over the energy range ~45 keV to 500 keV and with a temporal resolution of 30 s. EIS development is led by Co-I B. H. Mauk (Applied Physics Laboratory), who also heads the Energetic Particle investigation as a whole.
    41 </p>
    42 <p>
    43 '''FIELDS''' [[BR]]
    44  The FIELDS investigation is an advanced suite of six sensors to measure critical electric and magnetic fields in and around reconnection regions. The investigation is led by Co-I R. B. Torbert (University of New Hampshire).
     40
     41'''FIELDS''': The FIELDS investigation is an advanced suite of six sensors to measure critical electric and magnetic fields in and around reconnection regions. The investigation is led by Co-I R. B. Torbert (University of New Hampshire).
    4542 * Analog Fluxgate (AFG) and Digital Fluxgate (DFG) Magnetometers: The AFG and DFG sensors are provided by UCLA and the Technical University of Braunschweig, respectively. C. T. Russell (UCLA) has overall responsibility for fluxgate development. The two different kinds of magnetometers will provide redundant measurements of the magnetic field and current structure in the diffusion region.
     43
    4644 * Electron Drift Instrument (EDI): The EDI determines the electric and magnetic fields by measuring the drift of ~1 keV electrons emitted from the Gun Detector Unit (GDU). Each GDU sends (receives) a coded beam to (from) the other EDI-GDU. The EDI gun is being developed at the Institut fuer Weltraumforschung of the Austrian Academy of Sciences; EDI optics are being developed at the University of Iowa.
    4745 * Double Probes: MMS requires two sets of double-probe instruments. The Spin-plane Double Probe (SDP) consists of four 48-meter wire booms with spherical sensors at the end. The Axial Double Probe (ADP) consists of two 10-meter antennas deployed axially near the spacecraft spin axis. The SDP and ADP provide full 3D electric field measurements over a range from DC to 100 kHz with an accuracy of 0.5 mV/m (SDP) and 1 mV/m (ADP).
    4846 * Search Coil Magnetometer (SCM): The SCM will measure the 3-axis AC magnetic field up to 6 kHz and will be used together with the ADP and SDP to determine the contribution of plasma waves to the turbulent dissipation that occurs in the diffusion region. The SCM is being developed in France at the Centre d'etude des Environnements Terrestre et Planetaires.
    49 </p>
    50 <p>
    51 '''ASPOC''' [[BR]]
    52 the ASPOOCs neutralize the electrical potential of the spacecraft, allowing measurement of low-energy ions and electrons by the plasma instruments and eliminating spurious electric fields that can contaminate double-probe measurements.The ASPOCs are being developed at the Institut fuer Weltraumforschung of the Austrian Academy of Sciences.
    53 </p>
    54 <p>
    55 '''CIDP''' [[BR]]
    56 The CIDP provides the interface between the instruments and the spacecraft C&DH subsystem. The CIDP is being developed at Southwest Research Institute.
    57 </p>
     47
     48'''ASPOC''': The ASPOOCs neutralize the electrical potential of the spacecraft, allowing measurement of low-energy ions and electrons by the plasma instruments and eliminating spurious electric fields that can contaminate double-probe measurements.The ASPOCs are being developed at the Institut fuer Weltraumforschung of the Austrian Academy of Sciences.
     49
     50'''CIDP''': The CIDP provides the interface between the instruments and the spacecraft C&DH subsystem. The CIDP is being developed at Southwest Research Institute.
    5851=  Atlas V Rocket  =
    5952