| definition |
- [Source: National Space Science Data Center, http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1990-105A-04 ]
The purpose of the precipitating electron/ion spectrometer, SSJ/4, is to measure fluxes and energies of electrons and ions precipitated into the upper atmosphere. Particles are separated by an electrostatic analyzer into 20 energy bands from 30 eV to 30 keV: (1) 10 high-energy levels, 0.948, 1.39, 2.04, 3.00, 4.40, 6.46, 9.48, 13.92, 20.44 and 30.00 keV; and (2) 10 low-energy levels, 30.0, 44.0, 64.6, 94.9, 139.2, 204.4, 300, 440, 646, and 948 eV. Channeltrons are used to count the impinging electrons and ions in each energy band.
Group: Instrument_Details
Entry_ID: SSJ/4
Group: Instrument_Identification
Instrument_Category: Solar/Space Observing Instruments
Instrument_Class: Particle Detectors
Short_Name: SSJ/4
Long_Name: Precipitating Electron/Ion Spectrometer
End_Group
Group: Associated_Platforms
Short_Name: DMSP 5D-2/F7
Short_Name: DMSP 5D-2/F8
Short_Name: DMSP 5D-2/F9
Short_Name: DMSP 5D-2/F10
Short_Name: DMSP 5D-2/F11
Short_Name: DMSP 5D-2/F12
Short_Name: DMSP 5D-2/F13
Short_Name: DMSP 5D-2/F14
Short_Name: DMSP 5D-3/F15
End_Group
Online_Resource: http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1990-105A-04
Group: Instrument_Logistics
Instrument_Owner: Department of Defense-Department of the Air Force (United States)
End_Group
End_Group
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