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Wavelength-range definitions for green light according to ISO or as commonly used in plant or remote sensing applications.

Usage

Green(std = "ISO")

Arguments

std

a character string "ISO", "Sellaro", "Broad", "RS", "LandsatOLI", "LandsatRBV", "LandsatTM", "LandsatETM", or "LandsatMSS".

Value

A waveband object defining a wavelength range.

Details

The different arguments passed to formal parameter std determine the range of wavelengths set as boundaries of the returned waveband object; "ISO" is an standardized definition based on human colour vision; "Sellaro" and "Broad" are non-standard but used in plant sciences; "RS" is non-standard but frequently used in remote sensing; the remaining definitions are for the published wavelength sensitivity range of imagers (cameras) in the Landsat satellite missions.

Note

The bands are defined as square windows, these can be applied to spectral data to obtain the "true" values, but they do not simulate the sensitivity of broad-band sensors or the spectral transmittance of ionic filters. Some band-pass interference filters may have very sharp cut-in and cut-off, and their effect can be approximated by a square window, but filters based on light absorption will show gradual tails and bell-shaped wavelength-windows. The Landsat instruments have very steep cut-in and cut-off slopes and are well approximated.

When released, this package will replace the package UVcalc.

References

Aphalo, P. J., Albert, A., Björn, L. O., McLeod, A. R., Robson, T. M., Rosenqvist, E. (Eds.). (2012). Beyond the Visible: A handbook of best practice in plant UV photobiology (1st ed., p. xxx + 174). Helsinki: University of Helsinki, Department of Biosciences, Division of Plant Biology. ISBN 978-952-10-8363-1 (PDF), 978-952-10-8362-4 (paperback). Open access PDF download available at doi:10.31885/9789521083631 .

ISO (2007) Space environment (natural and artificial) - Process for determining solar irradiances. ISO Standard 21348. ISO, Geneva.

Sellaro, R., Crepy, M., Trupkin, S. A., Karayekov, E., Buchovsky, A. S., Rossi, C., & Casal, J. J. (2010). Cryptochrome as a sensor of the blue/green ratio of natural radiation in Arabidopsis. Plant physiology, 154(1), 401-409. doi:10.1104/pp.110.160820 .

See also

waveband

Other unweighted wavebands: Blue(), Far_red(), IR(), Orange(), Purple(), Red(), UV(), UVA(), UVB(), UVC(), VIS(), Yellow()

Examples

Green()
#> Green.ISO 
#> low (nm) 500 
#> high (nm) 570 
#> weighted none 
Green("ISO") # 500 to 570
#> Green.ISO 
#> low (nm) 500 
#> high (nm) 570 
#> weighted none 
Green("Sellaro") # 500 to 570 nm
#> Green.Sellaro 
#> low (nm) 500 
#> high (nm) 570 
#> weighted none 

e_irrad(sun.spct, Green()) # W m-2
#> E_Green.ISO 
#>     49.2686 
#> attr(,"time.unit")
#> [1] "second"
#> attr(,"radiation.unit")
#> [1] "total energy irradiance"
q_irrad(sun.spct, Green()) # mol m-2
#>  Q_Green.ISO 
#> 0.0002201989 
#> attr(,"time.unit")
#> [1] "second"
#> attr(,"radiation.unit")
#> [1] "total photon irradiance"
q_irrad(sun.spct, Green(), scale.factor = 1e6) # umol m-2
#> Q_Green.ISO 
#>    220.1989 
#> attr(,"time.unit")
#> [1] "second"
#> attr(,"radiation.unit")
#> [1] "total photon irradiance"