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Ground level spectral irradiance at hourly intervals

Source: R/example.solar.spectra.data.r
sun_hourly_ozone.spct.Rd

Datasets containing the wavelengths at 1.0 nm interval and tabulated values of spectral irradiance for the sun for 21 May, at Jokioinen, Finland, under climatology-based mean ozone column and with a 20 'libradtran' assuming clear sky.

Usage

sun_hourly_ozone.spct

Format

A source_spct containing 32 spectra in long form (293 nm to 800 nm at 1 nm interval) and 6 variables.

Details

The variables are as follows:

  • w.length numeric (nm).

  • s.e.irrad numeric (W m-2 nm-1).

  • UTC POSIXct (UTC date and time).

  • ozone Factor with two levels.

  • sun.elevation Angle above the astronomical horizon (degrees).

  • spct.idx factor with one level per spectrum.

The data set includes spectra for day-time, not 24 h.

Note

The simulation methods has been described in Lindfors et al. (2009).

References

Lindfors, A.; Heikkilä, A.; Kaurola, J.; Koskela, T. & Lakkala, K. (2009) Reconstruction of Solar Spectral Surface UV Irradiances Using Radiative Transfer Simulations. Photochemistry and Photobiology, 85: 1233-1239

Author

Anders K. Lindfors (radiation transfer modelling).

Examples

e_irrad(sun_hourly_ozone.spct)
#> # A tibble: 32 × 3
#>    E_Total spct.idx     when.measured      
#>      <dbl> <chr>        <dttm>             
#>  1    46.1 m20percO3-02 2000-05-21 02:52:00
#>  2   113.  m20percO3-03 2000-05-21 03:52:00
#>  3   192.  m20percO3-04 2000-05-21 04:52:00
#>  4   271.  m20percO3-05 2000-05-21 05:52:00
#>  5   344.  m20percO3-06 2000-05-21 06:52:00
#>  6   404.  m20percO3-07 2000-05-21 07:52:00
#>  7   447.  m20percO3-08 2000-05-21 08:52:00
#>  8   470.  m20percO3-09 2000-05-21 09:52:00
#>  9   470.  m20percO3-10 2000-05-21 10:52:00
#> 10   448.  m20percO3-11 2000-05-21 11:52:00
#> # ℹ 22 more rows
wl_range(sun_hourly_ozone.spct)
#> [1] 293 800
getMultipleWl(sun_hourly_ozone.spct) # number of spectra
#> [1] 32