http://www.satellitetoday.com/technology/2015/01/23/geooptics-continues-constellation-preparations-through-new-partnerships/ "CICERO’s purpose is to provide Radio Occultation (RO) data to measure atmospheric temperature, moisture, and pressure to better predict weather phenomenon on Earth. GeoOptics’ satellites are designed to be very simple, focusing on receiving signals from Global Navigation Satellite Systems (GNSS) as they pass through Earth’s atmosphere."