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SEM-2 performance

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ESA / Applications / Observing the Earth / Meteorological missions / MetOp

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:

Total energy flux in 2 ranges (0.05-1 & 1-20 keV)
Maximum energy flux density and energy at which it occurs
4 point particle spectra
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