Unlike any ‘passive’ optical systems, SAR sensors do not require external illumination (sunlight) in order to collect (useful) data. Being a so called ‘active’ system, Radar provides its own energy source to illuminate the area of interest and targets – allowing Radar to acquire data completely independent of daylight or weather conditions.
A Radar remote sensing system is based on three main functionalities:
- The Transmission of the Radar microwave signal to the ground in its specific wave length (X-Band in the case of our Radar Constellation)
- The Reception a portion of the transmitted energy as backscatter from the ground surface
- The Processing of the returned signal into an image, alternatively a tailored monitoring or measurement product, considering signal strength and time delay.