Coordinated Ionospheric Reconstruction CubeSat Experiment (CIRCE) (IMAGE) Naval Research Laboratory Caption CIRCE dual CubeSats will fly in tandem in low Earth orbit to characterize ionospheric 2-dimensional structure (vertical and horizontal) using advanced UV and radio remote sensors and tomographic methods. Miniaturized in-situ sensors provide key insights to the radiation environment and density and composition in the spacecraft environment. Credit U.S. Naval Research Laboratory Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.