2.2.2 spase://SMWG/Instrument/LANL/1990/ESP LANL1990 Energetic Spectrometer for Particles (ESP) 2019-05-05T12:34:56Z Higher-energy particles have been measured since 1989 using the Energy Spectrometer for Particles (ESP). The ESP is a bismuth germanate crystal coupled to a thick plastic scintillator that is coupled to a photomultiplier tube [4]. The ESP instrument can measure the spectrum of electrons from 0.7 to 26 MeV and of protons from 11 to >20 MeV. spase://SMWG/Person/UNKNOWN PrincipalInvestigator Long-Term Energetic-Particle Databases from Geosynchronous and GPS Orbits https://www.osti.gov/biblio/645545 Overview of Energetic Particle Instruments flown in association with LANL. EnergeticParticleInstrument LANL1989 Energetic Sensor for Particles spase://SMWG/Observatory/LANL/1990