Calculate lambdaREMP. A wavelength number between 660 and 680 nm, where first derivative equals zero. After 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 = c(660, 680),
extent = NULL,
ext = NULL,
filename = NULL
)Arguments
- raster
a terra SpatRaster of normalized capture data.
- trough
character vector of wavelength to look for trough.
- extent
an extent or SpatVector used to subset SpatRaster. Defaults to the entire SpatRaster.
- ext
character, a graphic format extension.
- filename
NULL (default) to write automatically into products, provide full path and ext to override.
See also
Other Spectral calculations:
calculate_band_difference(),
calculate_band_ratio(),
calculate_derivative(),
calculate_raba(),
calculate_rabd(),
calculate_rmean()