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    ESA > Our Activities > Observing the Earth > The Living Planet Programme > Meteorological missions > MetOp

    SEM-2 performance

    MEPED

    Particles Detected
    Electrons : 30 keV to >300 keV
    Protons : 30 keV to >140 MeV
    Sensors 2 - Solid State Detector Electron Telescopes
    2 - Solid State Detector Proton Telescope
    4 - SSD Omnidirectional Proton Sensors
    Field of View Electron Telescopes: 30° Cone
    Proton Telescopes: 30° Cone
    Omni Sensors: 120° Cone
    Data Entities
    Electrons: 3 integral channels from >30 to >300 keV
    Protons: 5 Differential channels from 30 to 7000 keV
    5 integral channels from >7 to >140 MeV
    Output Data Format 1 Serial Data (Data, Clock and Gate)
    13 Analog Housekeeping Monitors
    9 Bi-Level Housekeeping Monitors

    Note: The MEPED interfaces to the spacecraft through a Data Processing Unit (DPU), which also supports the TED.
    Command Requirements 7 Pulse Command Lines
    6 Level Command Lines
    Size
    TED : 5.0" H x 9.9" W x 9.6" D
    DPU : 3.1" H x 9.5" W x 11" D
    Mass
    TED : 8300 g
    DPU : 4400 g
    Power
    TED : 3.9 Watts
    DPU : 3.6 Watts
    Temperature Range
    Operating : -20°C to +25°C
    Turn On : -30°C to +25°C
    Non Operating : -30°C to +30°C
    TED

    Particles Detected
    Electrons : 0.05 - 20 keV
    Protons : 0.05 - 20 keV
    Sensors Electrostatic Analyzers for Energy Selection and Continuous Dynode Electron Mupltipliers for Particle Counting
    Field of View 10° x 17° Cones : 0° Electrons
    (full width) 30° Electrons
    0° Positive Ions
    30° Positive Ions
    Data Entities For 0° and 30° Electrons and 0° and 30° Positive Ions:
    1. Total energy flux in 2 ranges (0.05-1 & 1-20 keV)
    2. Maximum energy flux density and energy at which it occurs
    3. 4 point particle spectra
    4. Background
    Output Data Format 1 Serial Data (Data, Clock and Gate)
    13 Analog Housekeeping Monitors
    9 Bi-Level Housekeeping Monitors

    Note: The TED interfaces to the spacecraft through a Data Processing Unit (DPU), which also supports the MEPED.
    Command Requirements 7 Pulse Command Lines
    6 Level Command Lines
    Size
    TED : 6.8" H x 5.7" W x 12" D
    DPU : 3.1" H x 9.5" W x 11" D
    Mass
    TED : 4200 g
    DPU : 4400 g
    Power
    TED : 2.2 Watts
    DPU : 3.6 Watts
    Temperature Range
    Operating : -20°C to +30°C
    Turn On : -30°C to +30°C
    Non Operating : -30°C to +40°C

    Last update: 29 June 2006

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