Radar remote sensing is a special type of remote sensing. Microwaves with wavelengths ranging from 1 m to 1 cm are used for this method.
The main advantage of the radar remote sensing is the ability to collect imagery regardless of the weather conditions and the time of day. The microwave radiation can go freely through clouds and unlike the infrared or visible range it doesn't need the daylight.

Qualitatively processed radar data can be a good alternative of images in visible range. There are 3 stages of radar remote sensing data processing:
  • Single Look Complex (SLC) – Single Look Complex data retains the phase and amplitude information of the original SAR data. Single Look Complex product data is stored in slant range, and is corrected for satellite reception errors, includes latitude/longitude positional information. In addition, Single Look Complex data retains the optimum resolution available for each beam mode. This product is suitable for interferometric processing.
  • Geocoded image. An image is georeferenced to the certain coordinate system. As a rule all data is supplied in GeoTIFF file format.
  • Orthorectified image. These high-quality images don't have geometric distortion. Orthorectified images are used for the spatial analysis and for mapping.
Application:
  • Ecological monitoring, environmental pollution monitoring;
  • Earth's surface deformation monitoring, displacements monitoring;
  • DEM creation (e.g. SRTM is based on the radar data)

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