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Calculate STR from SWIR Bottom of Atmosphere Band

Source: R/utilities.R
calculate_str.Rd

Use this function to prepare STR from SAFE imagery when you have already downloaded Sentinel 2 image files in advance

Usage

calculate_str(img_stk, scale_factor = 10000)

Arguments

img_stk,

terra SpatRaster, multiband stack of images, already clipped to aoi

scale_factor,

integer, scaling factor for EO data source default 10000, to scale Sentinel-2 15 bit DN to range (0, 1)

Value

STR, SpatRaster of STR band

Note

For Landsat images, scale_factor should be 1, since Landsat metadata contains gain and offset for scaling image bands.

Examples

img_stk <- terra::rast(system.file("extdata", "BOA",
         "BOA_2022-12-11_T36RXV.tif", package = "rOPTRAM"))
STR_dir = tempdir()
str <- calculate_str(img_stk)