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MODIS/Terra Land Surface Temperature/3-Band Emissivity Daily L3 Global 1km SIN Grid Day V061 provides daily global land surface temperature and emissivity estimates. The MOD21 algorithm from NASA's LPCLOUD uses a physics-based Temperature/Emissivity Separation technique on MODIS thermal infrared bands. Data is produced daily at a 1,000-meter spatial resolution on a sinusoidal grid.
Users must apply Quality Control (QC) filtering to remove contaminated pixels causing high temperature outliers, as values are retained in the output. The algorithm does not employ high temperature outlier thresholds to preserve signals from fires and lava flows.