SAR, or Synthetic Aperture Radar, is a technology used to create detailed images of the Earth's surface. It works by sending out radar signals and measuring the time it takes for the signals to bounce back after hitting an object. This allows SAR to capture high-resolution images, even in poor weather conditions or at night. SAR is commonly used in various fields, including earth observation, environmental monitoring, and military reconnaissance. Its ability to penetrate clouds and provide consistent data makes it valuable for mapping landscapes, monitoring changes in the environment, and supporting disaster response efforts.