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GOES Space Environment Monitor (SEM) L0 data from OSPO

Metadata Updated: December 16, 2023

The Space Environment Monitor (SEM) is a suite of instruments onboard the GOES satellite series. The objective of the SEM package is to measure solar radiation in the X-ray and Extreme Ultraviolet (EUV) region, the in-situ magnetic field, and the energetic particle environment at geosynchronous orbit. This collection contains L0 data from GOES 8-12, provided as monthly binary files and L0 data from GOES 13-15, provided as daily binary and ASCII files. The SEM instrument on GOES 8-12 is composed of four sensors: SEM/EPS (Energetic Particle Sensor), SEM/HEPAD (High Energy Proton and Alpha Particles Detector), SEM/MAG (Magnetometer), and SEM/XRS (X-Ray Sensor). The GOES 13-15 SEM suite added these 3 sensors: SEM/EUVS (Extreme Ultraviolet Sensor), SEM/MAGED (Magnetospheric Electron Detector), and SEM/MAGPD (Magnetospheric Proton Detector). On GOES 13-15, the historical EPS sensor was renamed EPEAD (Electron, Proton, and Alpha Detector) and the term EPS now refers to the suite of particle detectors (EPEAD, MAGED, MAGPD). Combined these sensors provide magnetic field, energetic particle, and solar x-ray and EUV data. The magnetometer (MAG) measures the magnitude and direction of the magnetic field. The energetic particle detectors (EPS, HEPAD, EPEAD, MAGED, MAGPD, and MAGED) measure a spectrum of electron, proton, and alpha-particle fluxes caused by solar activity and galactic cosmic rays. The solar x-ray sensor (XRS) measures solar X-ray fluxes for the wavelength bands of 0.05-.4 nm (short channel) and .1 to .8 nm (long channel). The extreme ultraviolet sensor (EUVS) measures the EUV in 5 bands (A-E) spanning wavelengths 5-127 nm. The temporal period of record (POR) for this collection extends from April 1994 to March 2020. The data were produced by the NOAA/NESDIS Office of Satellite and Product Operations (OSPO) and archived by NOAA's Comprehensive Large Array-Data Stewardship System (CLASS). To access this data, contact NCEI for distribution and ordering instructions.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Date November 10, 2023
Metadata Created Date December 16, 2023
Metadata Updated Date December 16, 2023
Reference Date(s) 1994-05 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NGDC STP Space Weather

Graphic Preview

Image of NOAA GOES spacecraft

Additional Metadata

Resource Type Dataset
Metadata Date November 10, 2023
Metadata Created Date December 16, 2023
Metadata Updated Date December 16, 2023
Reference Date(s) 1994-05 (publication)
Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
Contact Email
Guid gov.noaa.ncei.swx:goes_sem-l0
Access Constraints Cite as: GOES Space Environment Monitor (SEM) L0 data from OSPO. [indicate subset used]. NOAA National Centers for Environmental Information. [access date]., Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Coupled Resource
Frequency Of Update notPlanned
Graphic Preview Description Image of NOAA GOES spacecraft
Graphic Preview File
Graphic Preview Type JPG
Harvest Object Id 6a7674e4-22bf-4ab6-a9f6-657b2fe9886b
Harvest Source Id 720e273e-9143-4e92-8a4c-fe2bf3aacd0b
Harvest Source Title NGDC STP Space Weather
Lineage The data were produced by the NOAA Office of Satellite and Product Operations (OSPO).
Metadata Language eng; USA
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System Non geographic dataset
Spatial Harvester True
Temporal Extent Begin 1994-05
Temporal Extent End 2020-03

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