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Ground level spectral irradiance and sun elevation

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

Datasets containing the wavelengths at 1.0 nm interval and tabulated values of spectral irradiance and its direct and diffuse components at different sun elevation angles under clear sky conditions.

Usage

sun_elevation.spct

Format

A source_spct containing 34 spectra in long form (290.5 nm to 699.5 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)

  • s.e.irrad.dir numeric (W m-2 nm-1)

  • s.e.irrad.diff.down numeric (W m-2 nm-1)

  • s.e.irrad.diff.up numeric (W m-2 nm-1)

  • sun.elevation factor with one level per spectrum

References

Quick TUV calculator https://www.acom.ucar.edu/Models/TUV/Interactive_TUV/.

Author

Pedro J. Aphalo (radiation transfer modelling with Quick TUV calculator, TUV 5.3)

Examples

e_irrad(sun_elevation.spct)
#> # A tibble: 34 × 3
#>    E_Total sun.elevation when.measured      
#>      <dbl> <chr>         <dttm>             
#>  1    564. tuv-00        2015-06-30 00:00:00
#>  2    562. tuv-05        2015-06-30 00:00:00
#>  3    554. tuv-10        2015-06-30 00:00:00
#>  4    542. tuv-15        2015-06-30 00:00:00
#>  5    526. tuv-20        2015-06-30 00:00:00
#>  6    505. tuv-25        2015-06-30 00:00:00
#>  7    480. tuv-30        2015-06-30 00:00:00
#>  8    450. tuv-35        2015-06-30 00:00:00
#>  9    417. tuv-40        2015-06-30 00:00:00
#> 10    380. tuv-45        2015-06-30 00:00:00
#> # ℹ 24 more rows
wl_range(sun_elevation.spct)
#> [1] 290.5 699.5
getMultipleWl(sun_elevation.spct) # number of spectra
#> [1] 34