A constellation of 24 6-unit CubeSats in low Earth orbit that provide radio occultation data to measure atmospheric temperature, humidity, density, and pressure, as well as ocean and ice properties, in order to contribute to climate research, improve weather forecasting, and contribute to the study of disruptive storms in the ionosphere (space weather). Launches began on 23 June 2017 from the Satish Dhawan Space Centre, India.

https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=2936&context=smallsat Cicero – A Distributed Small Satellite Radio Occultation Pathfinder Mission.