Using MODIS QA band information, filter the NDVI time series.
filter_qa(DT, qa = "SummaryQA", good = c(0, 1))
data.table of NDVI time series
QA column. default is 'SummaryQA'.
values which correspond to quality pixels. default is 0 and 1.
filtered data.table with appended 'filtered' column of "quality" NDVI.