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getRTMo Calculates the spectra of hemisperical and directional observed visible and thermal radiation (fluxes E and radiances L), as well as the single and bi-directional gap probabilities

getRTMo.Rd

updates:

  • 10 Sep 2007 (CvdT) - calculation of Rn

  • 5 Nov 2007 - included observation direction

  • 12 Nov 2007 - included abs. PAR spectrum output - improved calculation efficiency

  • 13 Nov 2007 - written readme lines

  • 11 Feb 2008 (WV&JT) - changed Volscat - small change in calculation Po,Ps,Pso (author:JT) - introduced parameter 'lazitab' - changed nomenclature - Appendix IV: cosine rule

  • 04 Aug 2008 (JT) - Corrections for Hotspot effect in the probabilities

  • 05 Nov 2008 (CvdT) - Changed layout

  • 04 Jan 2011 - Included Pso function (Appendix IV) (JT&CvdT) - removed the analytical function (for checking)(JT&CvdT)

  • 02 Oct 2012 (CvdT) - included incident PAR in output

  • Jan/Feb 2013 (WV) - Major revision towards SCOPE version 1.40: - Parameters passed using structures - Improved interface with MODTRAN atmospheric data - Now also calculates 4-stream - reflectances rso, rdo, rsd and rdd analytically

  • Apri 2013 (CvT) - improvements in variable names and descriptions

  • Dec 2019 CvdT mSCOPE representation, lite option

Usage

getRTMo(
  data.spectral,
  atmo,
  data.soil,
  data.leafopt,
  data.canopy,
  data.leafbio,
  data.angles,
  data.meteo,
  data.opts,
  canopy.model,
  get.plots = T
)

Arguments

data.spectral

information about wavelengths and resolutions

atmo

MODTRAN atmospheric parameters

data.soil

soil properties

data.leafopt

leaf optical properties

data.canopy

canopy properties (such as LAI and height)

data.leafbio

leaf biochemical parameters (Cab, Car...)

data.angles

viewing and observation angles

data.meteo

has the meteorological variables. Is only used to correct, the total irradiance if a specific value is provided instead of the usual Modtran output.

data.opts

simulation options. Here, the option

canopy.model

Selection of canopy model. THe canopy models available are 'fourSAIL', 'fourSAIL' and 'INFORM'. By default fourSAIL model will be used.

get.plots

is true plot the intermediate plots

References

Verhoef (1998), 'Theory of radiative transfer models applied in optical remote sensing of vegetation canopies'. PhD Thesis Univ. Wageninegn. Verhoef, W., Jia, L., Xiao, Q. and Su, Z. (2007) Unified optical - thermal four - stream radiative transfer theory for homogeneous vegetation canopies. IEEE Transactions on geoscience and remote sensing, 45,6. Verhoef (1985), 'Earth Observation Modeling based on Layer Scattering Matrices', Remote sensing of Environment, 17:167-175.

Author

 Wout Verhoef, Christiaan van der Tol, Joris Timmermans (Original version in Matlab)

Carlos Camino (Ported version into R)

Examples

if (FALSE) { # \dontrun{
rad <- getRTMo(data.spectral, atmo, data.soil, data.leafopt, data.canopy,
                data.leafbio, data.angles, data.meteo, data.opts,
                canopy.model = "fourSAIL", get.plots = FALSE)
} # }