2.7.2 spase://SMWG/Observatory/CGRO NASA The Compton Gamma-Ray Observatory (CGRO) 2026-09-17T13:18:17 The Compton Gamma-Ray Observatory is one of NASA's four "Great Observatories". It's specific mission is to study the sources and astrophysical processes (e.g., nuclear reactions, electron bremsstrahlung, matter-antimatter annihilation, elementary particle producation and decay, Compton scattering, and synchrotron radiation) that produce that highest energy electromagnetic radiation from the cosmos. GRO carries a complement of four instruments that provide simultaneous observations covering over five decades of energy from 0.1 MeV to 30 GeV: the Burst and Transient Source Experiment (BATSE), the Oriented Scintillation Spectrometer Experiment (OSSE), the Imaging Compton Telescope (COMPTEL), and the Energetic Gamma-Ray Experiment Telescope (EGRET). spase://SMWG/Person/Neil.Gehrels ProjectManager spase://SMWG/Person/Olga.Y.Uritskaya MetadataContact https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1991-027B Earth.NearSurface 1991-04-05 1991-04-05T12:00:00 2000-05-01T00:00:00