Many organizations rely on satellite imagery to gain a bird’s eye view of an unfolding event. However, if flood waters need to be viewed at night or when there is cloud cover (often the case during storms that precipitate flooding events), satellite imagery is of no help since most sensors cannot capture data at night or through clouds.
The use of Synthetic Aperture Radar (SAR) data has become increasingly popular for monitoring natural disasters due in large part to its ability to capture data at night and see through cloud cover, dust and smoke. SAR data can not only see where other sensors have blind spots, it can monitor millimeter-scale changes over broad areas and provide insights to fill in the blanks left by other sensors. Using ENVI® and SARscape®, flood analysis can be quickly accomplished so flood regions and areas of standing water can be identified, allowing decision makers to gather timely information and calculate flood extent to respond to and mitigate effects from floods.