Which remote-sensing drought indices does DMAP V2.1 calculate?
In short: remote-sensing drought indices use satellite observations to monitor drought over large areas where station data are sparse. Common ones include NDVI (vegetation greenness), the Vegetation Condition Index (VCI), the Temperature Condition Index (TCI), and the combined Vegetation Health Index (VHI), plus evapotranspiration- and soil-moisture-based measures. DMAP V2.1 adds remote-sensing drought indices to its meteorological, agricultural, and hydrological indices, drawing on satellite products such as MODIS.