Solar Radiation Spectrum

SORCE Spectral Irradiance
;
; SELECTION CRITERIA
; date range: 20030414 to 20200225
; cadence: 24 hours (daily)
; spectral range: 240.0 to 2413.0 nm
; number of data: 7142777
; identifier_product_doi: 10.5067/LDDKZ3PXZZ5G
; identifier_product_doi_authority: https://doi.org/
; END SELECTION CRITERIA
;
; DATA DEFINITIONS, number = 9 (name, type, format)
; nominal_date_yyyymmdd, R8, f10.1
; nominal_date_jdn, R8, f10.1
; min_wavelength, R4, f8.2 (nm)
; max_wavelength, R4, f8.2 (nm)
; instrument_mode_id, I2, i3
; data_version, I2, i3
; irradiance, R8, e13.6 (W/m^2/nm)
; irradiance_uncertainty, R4, e11.4 (W/m^2/nm, 1 sigma)
; quality, R4, f8.1 (see release notes for description)
; END DATA DEFINITIONS
;
; Background on the SORCE-SIM Spectral Irradiance Measurements
;
; The SORCE-SIM Solar Spectral Irradiance (SSI) data products are provided on a
; fixed wavelength scale which varies in spectral resolution from 1-34 nm over the
; entire spectral range. Irradiances are reported at a mean solar distance of 1 AU
; and zero relative line-of-sight velocity with respect to the Sun.
;
; As a separate data product, a composite SORCE SSI using the XPS, SOLSTICE, and
; SIM instruments, covering 0.1-2412.3 nm, is also delivered daily to
; http://lasp.colorado.edu/lisird/data/sorce_ssi_l3/.
;
; Table: SORCE-SIM Solar Spectral Irradiance (SSI) Measurement Summary.
;
; Measuring Instrument SIM (Spectral Irradiance Monitor)
; Temporal Cadence Daily
; Detector Radiometer (ESR) and Photodiodes (UV, VIS, & IR)
; Instrument Modes 31 (ESR), 41 (VIS), 43 (UV), 44 (IR)
; Spectral Range 240-2412.3 nm
; Spectral Resolution variable (1-34 nm)
; Accuracy 2%
; Long-Term Repeatability < 0.1%/yr
;
; Data QUALITY and IRRADIANCE UNCERTAINTY are reported in V27. MISSING data have
; values of 0.0000e+00 for both IRRADIANCE and IRRADIANCE UNCERTAINTY. UV data
; before mission day 800 (yyyymmdd = 20050403) in the 306-310 nm bandpass are
; treated as MISSING due to potential saturation. All IR (950-1600 nm) IRRADIANCE
; UNCERTAINTY values are set to 2.5000e-04. See the SORCE-SIM V27 release notes
; for justification and further details.
;
; Solar spectral irradiances are tabulated below ("DATA RECORDS"), with each row
; giving the nominal date in YYYYMMDD.D and Julian Day Number (JDN), the
; wavelength of the irradiance measurement (repeated in the MIN_WAVELENGTH and
; MAX_WAVELENGTH fields), the INSTRUMENT_MODE, DATA_VERSION, spectral IRRADIANCE,
; IRRADIANCE_UNCERTAINTY, and data QUALITY flag. Each field (column) is defined
; and described in the "DATA DEFINITIONS" above. An IDL file reader
; (http://lasp.colorado.edu/data/sorce/file_readers/read_lasp_ascii_file.pro) is
; available which will read this file and return an array of structures whose
; field names and types are taken from the "DATA DEFINITIONS" section.
;
; Jerald Harder (2020), SORCE SIM Level 3 Solar Spectral Irradiance Daily Means V027,
; Greenbelt, MD, USA, Goddard Earth Sciences Data and Information Services Center
; (GES DISC), Accessed [Data Access Date] at https://doi.org/10.5067/LDDKZ3PXZZ5G
;
; This data file, release notes, and other SORCE data products may be obtained
; from: http://lasp.colorado.edu/home/sorce/data/
;
; For more information on the SORCE instruments and data products, see:
; http://lasp.colorado.edu/home/sorce/

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