Radar sensor held up next to 10c coin (IMAGE) University of Waterloo Caption Radar sensor held up next to 10c coin to give size comparison. Credit University of Waterloo Usage Restrictions To be used with this release and stories about this research. License Original content 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.