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Instruments - SEM-2printer friendly page
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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