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/16/EXIS/XRS/Science/L2/BKD1D/P1D NOAA NumericalData GOES-16 EXIS/XRS Science Level 2 Daily X-ray Background and Mean Irradiance GOES-16 XRS L2 Science-Quality 1-day Background (bkd1d) 2026-10-22T00:00:00Z 2026-10-22T00:00:00Z Initial metadata creation. SY GOES-16 EXIS/XRS science-quality 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 science-quality data are retrospectively reprocessed and distributed separately from the operational data. 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-16 EXIS/XRS Science-Quality Level 2 Daily Background NetCDF Archive https://data.ngdc.noaa.gov/platforms/solar-space-observing-satellites/goes/goes16/l2/data/xrsf-l2-bkd1d_science/ 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 Science-Quality Level 2 spase://NOAA/Instrument/GOES/16/EXIS/XRS Irradiance 2017-02-07T00:00:00Z 2025-04-07T23:59:59Z 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