A dataset containing the wavelengths at a 1 nm interval and the corresponding spectral (energy) irradiance. Values simulated for 2 June 2012, at Helsinki, under clear sky conditions. The variables are as follows:
Format
A source_spct object and a data.frame, each with 511
rows and 3 variables
An object of class tbl_df (inherits from tbl, data.frame) with 511 rows and 3 columns.
An object of class source_spct (inherits from generic_spct, tbl_df, tbl, data.frame) with 522 rows and 3 columns.
An object of class tbl_df (inherits from tbl, data.frame) with 511 rows and 3 columns.
Note
The simulations are based on libRadTran using hourly mean global radiation measurements to estimate cloud cover. The simulations were for each hour and the results integrated for the whole day.
Deprecation!
Objects sun.daily.spct and sun.daily.data have been renamed
into sun_daily.spct and sun_daily.data, for consistency with
other data sets in the package. Please, use the new names for new code.
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
See also
Other Spectral data examples:
A.illuminant.spct,
D50.illuminant.spct,
D65.illuminant.spct,
Ler_leaf.spct,
black_body.spct,
ccd.spct,
clear.spct,
filter_cps.mspct,
green_leaf.spct,
phenylalanine.spct,
photodiode.spct,
sun.spct,
sun_evening.spct,
two_filters.spct,
water.spct,
white_led.source_spct
Examples
sun.daily.spct
#> Object: source_spct [522 x 3]
#> Wavelength range 280-800 nm, step 0.9-1 nm
#> Label: sunlight, simulated
#> Measured on 2012-06-01 UTC
#> Measured at 60.20911 N, 24.96474 E; Kumpula, Helsinki, FI
#> Variables:
#> w.length: Wavelength [nm]
#> s.e.irrad: Spectral energy exposure [J d-1 m-2 nm-1]
#> s.q.irrad: Spectral photon exposure [mol d-1 m-2 nm-1]
#> --
#> # A tibble: 522 × 3
#> w.length s.e.irrad s.q.irrad
#> <dbl> <dbl> <dbl>
#> 1 280 0 0
#> 2 281. 0 0
#> 3 282. 0 0
#> 4 283. 0 0
#> 5 284. 0 0
#> 6 284. 0 0
#> 7 285. 0 0
#> 8 286. 0 0
#> 9 287. 0 0
#> 10 288. 0 0
#> # ℹ 512 more rows
summary(sun.daily.spct)
#> Summary of source_spct [522 x 3] object: sun.daily.spct
#> Wavelength range 280-800 nm, step 0.9-1 nm
#> Label: sunlight, simulated
#> Measured on 2012-06-01 UTC
#> Measured at 60.20911 N, 24.96474 E; Kumpula, Helsinki, FI
#> Variables:
#> w.length: Wavelength [nm]
#> s.e.irrad: Spectral energy exposure [J d-1 m-2 nm-1]
#> s.q.irrad: Spectral photon exposure [mol d-1 m-2 nm-1]
#> --
#> w.length s.e.irrad s.q.irrad
#> Min. :280.0 Min. : 0 Min. :0.00000
#> 1st Qu.:409.2 1st Qu.:17595 1st Qu.:0.07917
#> Median :539.5 Median :23884 Median :0.12116
#> Mean :539.5 Mean :20948 Mean :0.09856
#> 3rd Qu.:669.8 3rd Qu.:26826 3rd Qu.:0.12923
#> Max. :800.0 Max. :32608 Max. :0.13813