Access to GOES SEM data

GOES-14 & GOES-15 Data Were Discontinued on March 4, 2020 -- SWPC Announcement

GOES-13 Data Were Discontinued on December 14, 2017 -- SWPC Announcement

NOAA's space weather monitoring mission continues with GOES-R series data

Reprocessed science-quality GOES 13-15 XRS data, plots, and associated documentation is available from the 'GOES 8-15' tab at https://www.ngdc.noaa.gov/stp/satellite/goes-r.html.

Direct Access to
SMS/GOES Data & Plots
./plots ./yyyy ./goesxx ./qc   Monthly quality control plots.
      ./summary   Monthly summary plots
  ./latest ./goesxx     QC and summary plots of latest 3-days, 14-days, and 108 days.
./full ./yyyy ./mm ./goesxx ./csv Full resolution data in CSV format, daily files.
        ./netcdf Full resolution data in NetCDF format, daily files.
./avg ./yyyy ./mm ./goesxx ./csv Time averaged data in CSV format, monthly files.
        ./netcdf Time averaged data in NetCDF format, monthly files.
./science ./mag
./xrs		       Some data have been reprocessed to more closely represent the environment.
./euvs         GOES_NOP_EUV_readme.pdf

There isn't a GOES NOP SEM user's guide, however, new users can familiarize themselves with the GOES NOP satellite series by reading relevant portions of the Data Book. Busy users can make do by just reading the section on the Space Environment Monitor.

Files in NetCDF and CSV (Comma Separated Variable) format are internally documented.
CSV files can be opened with MicroSoft Excel or similar software. Any text editor will also work.
If you open a CSV file in Excel you really should use this custom format for the first column: yyyymmdd hh:mm:ss.000
NetCDF files can be read with all programming languages, get details from UniData. Text editors will not work.

Data Notes:
GOES-13 began delivering operational data on April 14, 2010. EUV data are now available from 2006.
All data values have an associated quality flag, a quality flag table this spreadsheet will help decode this value. This quality flag is produced in real-time and does not include input from the validation process conducted by instrument scientists. A zero value indicates that no problems were discovered during processing, this does not mean that all is well, however. For example, the quality flag associated with GOES-13 magnetometer #2 is set to zero but the data are bogus. Quality flag definitions will evovle with time, updates will be referenced below.
GOES-13 magnetometer #2 is producing erroneous data, users should only use data from magnetometer #1.
GOES-13 X-ray were bad initially but have been good since January 2015. (see notes dated 2011-03-09 below)

GOES-14 X-ray data are available in the above data directory structure as of 2009-12-01.
GOES-15 X-ray data are available in the above data directory structure as of 2010-09-01.
GOES-14 X-ray data were made unavailable 2010-11-04.

2010-11-17 MAGED, MAGPD, HEPAD data schema updated to include corrected data. Corrections initially were incorrect and data were witheld. This affected GOES-13, GOES-14 and GOES-15. Retrospective data may or may not be updated.

2010-12-28 MAGED, MAGPD, HEPAD data corrections corrected and releasable

2018-11-16 Note on GOES 13-15 MAGPD Data Re-Release v3.

2011-02-09 GOES-13 X-ray data appear to resume.
2011-03-09 GOES-13 X-ray quality issues are described.
2011-03-09 New quality flag table includes new flags for GOES-13 X-ray data issues..
GOES-NOP measure energetic particles in two directions, this paper describes this capability:
The east‐west effect in solar proton flux measurements in geostationary orbit: A new GOES capability, Juan.Rodriguez@noaa.gov
2011-05-11 Example IDL code for reading GOES SEM NetCDF data files (ReadGoesNetCDF.pro)
Data file names that inlcude *cpflux* contain integrated proton data.
Full resolution data include lower level products, i.e., full resolution particle data include counts, averaged data include corrected flux.
2011-08-22 GOES-8 through GOES-12 data are now available in avg and displayed in plots.
2011-08-27 GOES-15 Magnetometer readme document by Howard.Singer@noaa.gov.

2012-01-24 HEPAD High Voltage Adjustment by Juan.Rodriguez@noaa.gov (Plots of GOES-15 & GOES-13 2012-01 HEPAD)

July 11, 2012: Direct HTTP access to the GOES SEM archive is now available only via this URL: https://satdat.ngdc.noaa.gov/sem/goes/data/
Previously available domains have been disabled.
October 31, 2013: To obtain true XRS fluxes from the published data users must correct for fudge factors as described in the GOES_XRS_readme.pdf.
March 21, 2014: Note on Revised Geometrical Factors for GOES 13, 14 and 15 EPEAD Electron Channels (April 14, 2010).

April 2014: A revised note on GOES 13‐15 Solar Protons and Yaw Flips.

September 2014: EPEAD_Electron_Science_Reprocessing_ATBD_v1.0.pdf
MAGEPD_PitchAngles_Processing_ATBD_v1.0.pdf.
June 2017: GOES-13 P1B Failure March 2017.pdf
September 2017: Note on HEPAD Processing

Direct Access to
Older GOES

These data are deprecated, see the newly formated and better documented versions above.
These data are being migrated to the NOP data model above.

./fits ./magnetometer ./YYMM Full resolution, 3s values, FITS binary tables, 1974 - 1996.
  ./xrays ./YYMM Full resolution, 3s values, FITS binary tables, 1974 - 1996.

In addition to the http access shown above, this same directory structure can be accessed though FTP.

You can view GOES SEM data in real time by visiting the Space Weather Prediction Center.