Initial weights for sentinel2 according to SCL band

SCL Value	Description	Quality	weight
1	Saturated or defective	Bad	\(w_{min}\)
2	Dark Area Pixels	Bad	\(w_{min}\)
3	Cloud Shadows	Bad	\(w_{min}\)
4	Vegetation	Good	\(w_{max}\)
5	Bare Soils	Good	\(w_{max}\)
6	Water	Good	\(w_{max}\)
7	Clouds Low Probability / Unclassified	Good	\(w_{max}\)
8	Clouds Medium Probability	Marginal	\(w_{mid}\)
9	Clouds High Probability	Bad	\(w_{mid}\)
10	Cirrus	Good	\(w_{mid}\)
11	Snow / Ice	Bad	\(w_{mid}\)

qc_sentinel2(SCL, wmin = 0.2, wmid = 0.5, wmax = 1)

Arguments

SCL

quality control variable for sentinel2

wmin

Double, minimum weigth (i.e. weight of snow, ice and cloud).

wmid

Dougle, middle weight, i.e. marginal

wmax

Double, maximum weight, i.e. good

References

https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_S2_SR

Examples

qc_sentinel2(1:11)
#> $QC_flag
#>  [1] "cloud"    "cloud"    "cloud"    "good"     "good"     "good"    
#>  [7] "good"     "marginal" "cloud"    "good"     "snow"    
#> 
#> $w
#>  [1] 0.2 0.2 0.2 1.0 1.0 1.0 1.0 0.5 0.2 1.0 0.2
#>