Ground level solar spectral irradiance (measured) — sun_may

Datasets containing the wavelengths at a 0.5 nm to 1.0 nm interval and tabulated values of measured spectral irradiance for the sun.

Usage

sun_may_morning.spct

Format

A source_spct object with 1421 rows (250 nm to 899 nm, variable step) and 2 variables.

Details

The variables are as follows:

w.length numeric (nm)
s.e.irrad numeric (W m-2 nm-1)

Note

Instrument used: Maya2000Pro scanning double monochromator spectroradiometer with a Bentham cosine corrected input optics. Recently calibrated at STUK. Date and time: 31 May 2013, 11:23 EEST. Place: University of Helsinki, Viikki Campus, Finland. Coordinates: 60.226183 N, 25.018302 E. Measurements done by Pedro J. Aphalo. Calibration and corrections done with package MayaCalc using bracketing and noise reduction (with filter measurement) and method "sun". Algorithm and calibration data by Lasse Ylianttila (STUK, Helsinki, Finland).

References

Ylianttila, L.; Visuri, R.; Huurto, L. & Jokela, K. (2005) Evaluation of a single-monochromator diode array spectroradiometer for sunbed UV-radiation measurements. Photochem Photobiol, 81, 333-341

Examples

sun_may_morning.spct
#> Object: source_spct [1,421 x 2]
#> Wavelength range 251-898.91 nm, step 0.43-0.48 nm 
#> Label: Solar spectrum, clear with some clouds 
#> Measured on 2013-05-31 08:20:56 UTC 
#> Measured at 60.2253 N, 25.01673 E; Viikki, Helsinki, Finland 
#> Variables:
#>  w.length: Wavelength [nm]
#>  s.e.irrad: Spectral energy irradiance [W m-2 nm-1] 
#> --
#> # A tibble: 1,421 × 2
#>    w.length  s.e.irrad
#>       <dbl>      <dbl>
#>  1     251   0.00239  
#>  2     251.  0.00209  
#>  3     252. -0.000121 
#>  4     252.  0.0109   
#>  5     253.  0.00182  
#>  6     253. -0.00325  
#>  7     254.  0.000463 
#>  8     254.  0.00842  
#>  9     255.  0.00500  
#> 10     255. -0.0000861
#> # ℹ 1,411 more rows
wl_range(sun_may_morning.spct)
#> [1] 251.00 898.91
e_irrad(sun_may_morning.spct)
#>  E_Total 
#> 266.2451 
#> attr(,"time.unit")
#> [1] "second"
#> attr(,"radiation.unit")
#> [1] "total energy irradiance"