2.0.0 spase://SMWG/Instrument/DMSP_5D-2/SSJ4 SSJ/4 Special Sensor for Precipitating Particles, Version 4 2019-05-05T12:34:56Z The purpose of the precipitating electron/ion spectrometer is to measure fluxes and energies of electrons and ions precipitated into the upper atmosphere; spase://SMWG/Person/Paul.L.Rothwell GeneralContact NSSDC's Master Catalog https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1995-015A&ex=04 Information about the Precipitating Electron/Ion Spectrometer (SSJ/4) experiment on the DMSP 5D-2 mission. Spectrometer SSJ/4 Special Sensor for Precipitating Particles, Version 4 on DMSP_5D-2 spase://SMWG/Observatory/DMSP_5D-2