gov.noaa.ngdc.stp.solar:G00543National Geophysical Data CenterNational Oceanic and Atmospheric Administration (NOAA)1976The Space Environment Monitor (SEM) instrument package on-board all GOES satellites has provided magnetometer, energetic particle, and soft X-ray data continuously since July 1974. Usually two GOES satellites operate at the same time in the Earth's equatorial plane. They travel in geosynchronous orbit (6.6 Earth radii) and are generally located at 75 and 135 degrees west longitude. This trajectory allows the detectors an unobstructed view of the sun for all but the few hours per year, around equinox and near midnight, when the Earth eclipses the sun. Higher resolution values for allthree sensors are averaged for each 5.0 minutes, which permits one month of data from one satellite to be stored on a single high density, IBM compatible, diskette (5.25" or 3.5"). Solid state detectors with pulse height discrimination measure protons from 0.8 to 500 MeV, alpha particles from 4.0 to 392 MeV,and electrons with kinetic energies greater than or equal to 2.0 MeV. Because charged particles in these energy ranges, accelerated in solar flares, can reach the vicinity of Earth in large numbers,they pose a hazard to satellites, manned space flight and to high-altitude aircraft. They also significantly affect the high-latitude ionosphere and may cause magnetic storms. See Entry_ID = G00036 for digital data.Solar Research1974070119840821UnknownCompleteunknownNASA/Global Change Master Directory (GCMD) Earth Science KeywordsEARTH SCIENCE > Sun-earth Interactions > Ionosphere/Magnetosphere Particles > Energetic ParticlesEARTH SCIENCE > Sun-earth Interactions > Ionosphere/Magnetosphere Particles > Electron FluxEARTH SCIENCE > Sun-earth Interactions > Ionosphere/Magnetosphere Particles > Proton FluxUncontrolled KeywordsSolarSolar PhysicsProtonsElectronsEnergeticNASA/GCMD Location KeywordsMagnetosphereIonosphereUncontrolled Location KeywordsSunInterplanetary (near Earth)Restriction Code: otherRestrictions; DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of CommerceSolar Data Managerphysical and mailing NOAA/NESDIS/NGDC E/GC2 325 Broadway BoulderCO80305303.497.6133 or 303.497.6323solar.ngdc@noaa.govUnknown 20111117Solar Data ManagerDOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commercemailing and physical NOAA/NESDIS/NGDC E/GC2 325 Broadway BoulderCO80305303.497.6133 or 303.497.6323solar.ngdc@noaa.govContent Standard for Digital Geospatial Metadata: Extensions for Remote Sensing MetadataFGDC-STD-012-2002