The Astravets Nuclear Power Station is under construction in the west of Belarus, close to the Lithuanian border. This TerraSAR-X change detection image combines two Staring SpotLight acquisitions from July and August 2016. The satellite passes were in descending orbit thus radar illumination is from the right of the image. By combining the radar backscatter from 2016-07-27 (red), 2016-08-07 (green) and the interferometric coherence (blue) in this composite image, changed areas can be detected so that construction progress can be monitored.
Changes are visible in the image as bright green (new objects) and red (disappeared objects). The southern cooling tower has increased in height, for example, shown by the change in the circular radar signature of the tower. The green (newer) circular signature is nearer to the sensor than the red (older) signature thereby implying an increase in height. Objects that appear at the same location during both satellite passes but that have temporarily moved between acquisitions, such as vehicles, appear yellow. Vegetation, which by its nature also slightly moves, is shown in a yellowish-green tone and can be seen surrounding the site.