NASA’s Cyclone Global Navigation Satellite System is a constellation of 8 micro-satellites that measures wind speed above the surface of the oceans and provides information on the strength of hurricanes. It uses a technique called scatterometry, which involves measuring the strength of signals broadcasted by GPS satellites.
The data obtained from the CYGNSS was used by scientists to track the movement of microplastics in the ocean. These small plastics, moving long the ocean currents, are harmful for marine life. Their locations were tracked using this satellite. It uses radar to measure ocean roughness, which is influenced by several factors like the wind speed and debris.