iSTORM (IMAGE) Naval Research Laboratory Caption U.S. Naval Research Laboratory’s (NRL) instrument, the in-Situ Thunderstorm Observer for Radiation Mechanisms (iSTORM), provides paradigm-changing observations of ionizing radiation from tropical thunderstorms aboard a NASA ER-2 high-altitude research aircraft. NRL designed and built the iSTORM instrument, which is shown integrated into the pod of the NASA ER-2. (Photo provided by Daniel Shy) Credit Daniel Shy Usage Restrictions N/A 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.