HDF5 file, superblock version 2
group /
	attribute Conventions = "CF-1.6, ACDD-1.3"
	attribute cdm_data_type = "Any"
	attribute cdr_variable = "TSI"
	attribute contributor_name = "Odele Coddington, Judith Lean, Chris Lindholm, and Peter Pilewskie"
	attribute contributor_role = "Principal Investigator and Point-of-Contact, Co-Investigator and originator of total and spectral solar irradiance model, software infrastructure developer, Co-Investigator"
	attribute creator_name = "Odele Coddington, Judith Lean, Chris Lindholm, Peter Pilewskie, NOAA CDR Program"
	attribute date_created = "2024-08-31"
	attribute date_modified = "2026-03-05"
	attribute geospatial_lat_max = " 90.0"
	attribute geospatial_lat_min = "-90.0"
	attribute geospatial_lon_max = " 180.0"
	attribute geospatial_lon_min = "-180.0"
	attribute id = "tsi_v03r00_daily_s18740509_e20251231_c20260305.nc"
	attribute institution = "Laboratory for Atmospheric and Space Physics"
	attribute keywords = "Earth Science &gt; Atmosphere &gt; Atmospheric Radiation &gt; Incoming Solar Radiation, Earth Science &gt; Atmosphere &gt; Atmospheric Radiation &gt; Solar Irradiance, Earth Science &gt; Atmosphere &gt; Atmospheric Radiation &gt; Solar Radiation, Earth Science &gt; Sun-Earth Interactions &gt; Solar Activity &gt; Solar Irradiance, Earth Science &gt; Paleoclimate &gt; Paleoclimate Reconstructions &gt; Solar Forcing/Insolation Reconstruction, Earth Science &gt; Sun-Earth Interactions &gt; Solar Activity &gt; Solar Irradiance, Earth Science &gt; Climate Indicators &gt; Sun-Earth Interactions &gt; Sunspot Activity &gt; Solar Flux, Earth Science &gt; Climate Indicators &gt; Paleoclimate Indicators &gt; Paleoclimate Reconstructions &gt; Solar Forcing/Insolation Reconstruction, Earth Science &gt; Climate Indicators &gt; Sun-Earth Interactions &gt; Solar Activity &gt; Solar Irradiance"
	attribute keywords_vocabulary = "Global Change Master Directory (GCMD) Science and Services Keywords"
	attribute license = "See Use Agreement for this CDR."
	attribute naming_authority = "gov.noaa.ncei"
	attribute product_version = "v03r00"
	attribute program = "NOAA Climate Data Record Program"
	attribute source = "NNLTSI1_v03r00"
	attribute spatial_resolution = "N/A"
	attribute standard_name_vocabulary = "CF Standard Name Table v29"
	attribute summary = "This Climate Data Record (CDR) contains total solar irradiance (TSI) as a function of time created with the NASA NOAA LASP (NNL) Version 1 model for total, spectral and high-resolution spectral solar irradiance. The CDR Version 3 improves the scientific quality of the earlier version, version 2.1, based on new research from several NASA Solar Irradiance Science Team activities, from improved accuracy, precision and stability of solar irradiance observations made by the TSIS-1 mission, and from operational and improved sources for facular brightening and sunspot darkening proxies. Total solar irradiance is the total, spectrally integrated energy input to the top of the Earth's atmosphere, at a standard distance of one Astronomical Unit from the Sun. Its units are W per m2. The dataset was created by Odele Coddington, Judith Lean, Chris Lindholm, and Peter Pilewskie (Laboratory for Atmospheric and Space Science, University of Colorado). The daily- and monthly-averaged TSI data range from 1874 to the present, and annual-averaged TSI data begin in 1610. The data file format is netCDF-4 following CF metadata conventions. The dataset is accompanied by algorithm documentation, data flow diagram and source code for the NOAA CDR Program."
	attribute sun_earth_distance_correction = "lasp_vsop87_1au_correction_P1D.nc; I_true = I_1AU * au_factor"
	attribute time_coverage_end = "2025-12-31"
	attribute time_coverage_start = "1874-05-09"
	attribute title = "Daily TSI calculated using NNL1 solar irradiance model"
dataset /TSI: float32, shape (55389)
	attribute _FillValue = nan
	attribute ancillary_variables = "TSI_UNC"
	attribute cell_methods = "time: mean"
	attribute correction = "multiplied by VSOP87 au_factor (1 AU -> true Sun-Earth distance)"
	attribute long_name = "NOAA Climate Data Record of Daily Total Solar Irradiance (W m-2)"
	attribute standard_name = "solar_irradiance"
	attribute units = "W m-2"
dataset /TSI_UNC: float32, shape (55389)
	attribute _FillValue = nan
	attribute correction = "multiplied by VSOP87 au_factor (1 AU -> true Sun-Earth distance)"
	attribute long_name = "Uncertainty in Daily Total Solar Irradiance (W m-2)"
	attribute units = "W m-2"
dataset /au_factor: float32, shape (55389)
	attribute _FillValue = nan
	attribute long_name = "VSOP87 Sun-Earth distance factor (1 AU / r)^2"
	attribute source = "lasp_vsop87_1au_correction_P1D.nc"
	attribute units = "unitless"
dataset /time: int64, shape (55389)
	attribute axis = "T"
	attribute bounds = "time_bnds"
	attribute calendar = "proleptic_gregorian"
	attribute standard_name = "time"
	attribute units = "days since 1610-01-01"
// time: first 96552, last 151940, count 55389