The Satellite Derived Radar Reflectivity is a method of mimicking the radar reflectivity that people are used to seeing on television provided by traditional land-based radar beams. This satellite derived radar reflectivity is tuned to display in dBZ values just like traditional radar. The dBZ values are derived from data measured by GOES satellites that are positioned to scan the United States and the surrounding bodies of water. This derived radar reflectivity, sometimes called “space radar” since the data is retrieved from orbiting satellites, is particularly useful for showing “radar” in areas not covered by land-based radar beams. During the Atlantic Hurricane Season, storms in the Caribbean Sea, Gulf of Mexico, or Atlantic Ocean can be showed to viewers in a manner they are familiar with. The storms with the heaviest rainfall and most potential for severe wind gusts associated with the storm core or outer bands can be tracked before they move inland. “Space Radar” is updated every 15 minutes to provide smooth looping for tracking weather systems. The product extends to global coverage by use of data from foreign orbiting satellites, such as MTSAT and METEOSAT.
Baron Weather issues a press release featuring Satellite Derived Radar to relate the threat of Tropical Cyclone Pam: http://www.baronweather.com/news/cyclones-in-the-pacific-ocean/