2.7.2 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NOAA/NumericalData/GOES/17/EXIS/XRS/Operational/L2/BKD1D/P1D NOAA NumericalData GOES-17 EXIS/XRS Operational Level 2 Daily X-ray Background and Mean Irradiance GOES-17 XRS L2 Operational 1-day Background (bkd1d) 2026-10-22T00:00:00Z 2026-10-22T00:00:00Z Initial metadata creation. SY GOES-17 EXIS/XRS operational Level 2 daily background (bkd1d) product distributed as a single NetCDF-4 file spanning the available observation period. It provides one daily X-ray background irradiance estimate and one daily mean irradiance for each of the XRS-A (0.05–0.4 nm) and XRS-B (0.1–0.8 nm) channels, together with daily mean coverage fractions and quality flags. Background values are derived from one-minute average XRS measurements: hourly means are calculated, the minimum hourly mean is selected within each of three eight-hour blocks, and the background is the lower of the central block minimum and the average of the minima from the first and third blocks. The operational data are distributed separately from the science-quality reprocessed series. Consult the XRS Level 2 ReadMe and User Guide for data interpretation. Machol, Janet; Codrescu, Stefan; Viereck, Rodney 2018-09-01T00:00:00Z NOAA National Centers for Environmental Information spase://SMWG/Person/Janet.L.Machol InstrumentScientist NOAA NCEI Instrument Scientist and scientific contact for GOES-R EXIS/XRS. spase://SMWG/Person/NOAA.GOES-R.EXIS GeneralContact NOAA GOES-R EXIS Team NOAA NCEI GOES-R EXIS Level 2 Dataset Metadata https://www.ncei.noaa.gov/access/metadata/landing-page/bin/iso?id=gov.noaa.ncei.swx%3Aexis-l2-goesr Official NOAA dataset description, citation, access details and lineage. NOAA GOES-R XRS Level 2 Data ReadMe https://data.ngdc.noaa.gov/platforms/solar-space-observing-satellites/goes/goes16/l2/docs/GOES-R_XRS_L2_Data_ReadMe.pdf NOAA product descriptions, operational/science processing differences, and data caveats. NOAA GOES-R XRS Level 2 Data User Guide https://data.ngdc.noaa.gov/platforms/solar-space-observing-satellites/goes/goes16/l2/docs/GOES-R_XRS_L2_Data_Users_Guide.pdf The User Guide describes the algorithms, parameters, time conventions, and interpretation of the XRS Level 2 products. spase://SMWG/Repository/NOAA/NCEI Online Open https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal NOAA-produced data are publicly available under NOAA's open data policy. Users should cite the NOAA NCEI dataset as specified in the dataset metadata. NOAA NCEI GOES-17 EXIS/XRS Operational Level 2 Daily Background NetCDF Archive https://data.ngdc.noaa.gov/platforms/solar-space-observing-satellites/goes/goes17/l2/data/xrsf-l2-bkd1d/ Directory containing the full-period daily background and daily average XRS Level 2 NetCDF file. NetCDF None Geostationary Operational Environmental Satellite, R-Series (GOES-R) Extreme Ultraviolet X-Ray Irradiance Sensors (EXIS) Level 2 Products Operational Level 2 spase://NOAA/Instrument/GOES/17/EXIS/XRS Irradiance 2018-06-01T00:00:00Z 2023-01-10T23:59:59Z P1D Sun Sun.Corona Time time Record start time of each daily XRS Level 2 sample, expressed as seconds since 2000-01-01 12:00:00 UTC, neglecting leap seconds. P1D s -9999 Temporal XRS-A Daily Background Irradiance bkd1d_xrsa_flux Daily background solar X-ray irradiance for XRS-A (0.05-0.4 nm). The background is derived from one-minute average measurements using hourly means in three 8-hour blocks. P1D W/m^2 -9999 Photon EnergyFlux 0.05 0.4 nm XRS-A Daily Background Quality Flag bkd1d_xrsa_flag Quality flag for bkd1d_xrsa_flux: 0 indicates good data and 1 indicates no value. P1D 255 DataQuality XRS-B Daily Background Irradiance bkd1d_xrsb_flux Daily background solar X-ray irradiance for XRS-B (0.1-0.8 nm). The background is derived from one-minute average measurements using hourly means in three 8-hour blocks. P1D W/m^2 -9999 Photon EnergyFlux 0.1 0.8 nm XRS-B Daily Background Quality Flag bkd1d_xrsb_flag Quality flag for bkd1d_xrsb_flux: 0 indicates good data and 1 indicates no value. P1D 255 DataQuality XRS-A Daily Mean Irradiance avg1d_xrsa_flux Daily average solar X-ray irradiance in the XRS-A band (0.05-0.4 nm). P1D W/m^2 -9999 Photon EnergyFlux 0.05 0.4 nm XRS-A Daily Average Coverage avg1d_xrsa_coverage Fraction of the day contributing to the XRS-A daily average irradiance, from 0 to 1. P1D 1 -9999 Other XRS-A Daily Average Quality Flag avg1d_xrsa_flag Quality flag for avg1d_xrsa_flux: 0 indicates good data, 1 indicates minimum coverage not met, and 2 indicates no data. P1D 255 DataQuality XRS-B Daily Mean Irradiance avg1d_xrsb_flux Daily average solar X-ray irradiance in the XRS-B band (0.1-0.8 nm). P1D W/m^2 -9999 Photon EnergyFlux 0.1 0.8 nm XRS-B Daily Average Coverage avg1d_xrsb_coverage Fraction of the day contributing to the XRS-B daily average irradiance, from 0 to 1. P1D 1 -9999 Other XRS-B Daily Average Quality Flag avg1d_xrsb_flag Quality flag for avg1d_xrsb_flux: 0 indicates good data, 1 indicates minimum coverage not met, and 2 indicates no data. P1D 255 DataQuality