DARPA’s Video Synthetic Aperture Radar (ViSAR) successfully demonstrated a new sensor that can capture real-time video through clouds for engaging moving ground targets from the aircraft

Recent military conflicts have demonstrated the need for close air support from precision attack platforms (e.g., the AC-130 gunship) to support ground forces. These aircraft typically use IR sensors to engage moving ground targets, such as vehicles and dismounts. Under clear conditions, targets can be easily identified and effectively engaged. In degraded environments, however, the atmosphere can inhibit traditional electro-optical sensors. Close-in air support therefore can currently only be conducted during clear weather conditions.