Pixel Quality Count 25m v.2.0.0

The Pixel Quality (PQ) product is an assessment of whether an image pixel represents an un-obscured, unsaturated observation of the Earth's surface and whether the pixel is represented in each spectral band. The PQ product allows users to produce masks which can be used to exclude pixels which don't meet various quality criteria from further analysis. The capacity to automatically exclude such pixels from analysis is essential for emerging multi-temporal analysis techniques that make use of every quality assured pixel within a time series of observations.

The PQ count (PQ-COUNT) product is a count of how many times a pixel contains a clear observation of the earth's surface (land or sea) at a particular location for a particular period of time. PQ-COUNT is available for the following epochs:

PQ-COUNT-SUMMARY, this contains a count of all observations contained within the DEA (from 1987 to the most up to date imagery available);

PQ-COUNT-ANNUAL-SUMMARY, this contains a count of the number of observations acquired in each full calendar year (1st of January - 31st December) from 1987 to the most recent full calendar year;

PQ-COUNT-SEASONAL-SUMMARY, this contains a count of the number of observations acquired within each calendar season (DJF, MAM, JJA, SON). This product is available for the most recent 8 seasons.