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Calculate lambdaREMP

Source: R/spectral_calculations.R
calculate_lambdaremp.Rd

Calculate lambdaREMP (wavelength of the red-edge minimum point). This is the wavelength between 660 and 680 nm where the first derivative of reflectance equals zero, indicating the maximum absorption of light by chlorophyll. Based on Ghanbari, H., Zilkey, D.R., Gregory-Eaves, I., Antoniades, D., 2023. A new index for the rapid generation of chlorophyll time series from hyperspectral imaging of sediment cores. Limnology and Oceanography: Methods 21, 703–717. https://doi.org/10.1002/lom3.10576

Usage

calculate_lambdaremp(
  raster,
  trough_range = c(660, 680),
  extent = NULL,
  extension = NULL,
  filename = NULL
)

Arguments

raster

A terra SpatRaster of normalized capture data.

trough_range

Numeric vector defining the wavelength range to search for trough (default: c(660, 680)).

extent

An extent or SpatVector used to subset SpatRaster. Defaults to the entire SpatRaster.

extension

Character, a graphic format extension.

filename

NULL (default) to write automatically into products folder, provide full path and extension to override.

Value

One layer terra SpatRaster with calculated lambdaREMP values.

See also

Other Spectral calculations: calculate_band_difference(), calculate_band_ratio(), calculate_derivative(), calculate_ndi(), calculate_raba(), calculate_rabd(), calculate_rmean()