Data Access
GOES-18 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.
Version:2.7.2
Version:2.7.2
GOES-18 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.
| Role | Person | StartDate | StopDate | Note | |
|---|---|---|---|---|---|
| 1. | InstrumentScientist | spase://SMWG/Person/Janet.L.Machol | |||
| 2. | GeneralContact | spase://SMWG/Person/NOAA.GOES-R.EXIS |
Official NOAA dataset description, citation, access details and lineage.
NOAA product descriptions, operational/science processing differences, and data caveats.
The User Guide describes the algorithms, parameters, time conventions, and interpretation of the XRS Level 2 products.
Directory containing the full-period daily background and daily average XRS Level 2 NetCDF file; the filename changes as the coverage period is extended.
Record start time of each daily XRS Level 2 sample, expressed as seconds since 2000-01-01 12:00:00 UTC, neglecting leap seconds.
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.
Quality flag for bkd1d_xrsa_flux: 0 indicates good data and 1 indicates no value.
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.
Quality flag for bkd1d_xrsb_flux: 0 indicates good data and 1 indicates no value.
Daily average solar X-ray irradiance in the XRS-A band (0.05-0.4 nm).
Fraction of the day contributing to the XRS-A daily average irradiance, from 0 to 1.
Quality flag for avg1d_xrsa_flux: 0 indicates good data, 1 indicates minimum coverage not met, and 2 indicates no data.
Daily average solar X-ray irradiance in the XRS-B band (0.1-0.8 nm).
Fraction of the day contributing to the XRS-B daily average irradiance, from 0 to 1.
Quality flag for avg1d_xrsb_flux: 0 indicates good data, 1 indicates minimum coverage not met, and 2 indicates no data.