Details
This dataset provides per-pixel information on the frequency and quality of Landsat acquisitions between 1982 and 2020. For each year, we counted the number of acquisitions and evaluated the intra-annual acqusition quality. The closer the quality metric is in value to the acquisition frequency, the better the quality of the satellite images. In addition, this dataset provides a quality index, which is the quotient between the image quality metric and the acquisition frequency. The closest the output is to 1, the highest the quality of the imagery in the given year.
Subdatasets
imageFrequency | Number of satellite acquisitions per pixel
monthFrequency | Number of observed months
quality | Sum of quality weights per pixel
distributionQuality | Normalized metric on the balance of image quality across the year
nrTiles | Number of tiles contribution with acquisitions
masDMT query
# data call without specifying subdataset and resolution
list_data("LTQA")
# data call for specific subdataset
list_data("LTQA/imageFrequency")
# data call to subdataset with a specific resolution
list_data("LTQA/imageFrequency/1km")