Small On-Board Environmental Diagnostic Sensors Package (SOBEDS)

This report contains the summary of the scientific and engineering work performed as part of the development of the High Energy Proton instrument (HEP) and of the Low Energy Particle and Dosimetry instrument (LEPDOS). These instruments are part of the SOBEDS suite of instruments being developed by Amptek, Inc. The purpose of the HEP instrument is to measure the energy spectrum of energetic protons, specifically to obtain a differential spectrum for 25 < E < 440 MeV and integral counts for E > 440 MeV. The purpose of the LEPDOS instrument is to measure: (1) the lower energy protons and electrons which may cause spacecraft anomalies, specifically protons from 0.7 to 80 MeV and electrons from 5 to > 250 keV, (2) the dose and dose rate experienced by spacecraft electronics, (3) particles causing single event effects, and (4) to provide real-time warnings to spacecraft and operators of environmental conditions likely to cause anomalies, such as surface charging and deep dielectric charging.