Working on MidSTAR (IMAGE) NASA/Goddard Space Flight Center Caption Midshipman First Class (M1C) Alexander Sandroni, USNR (left) and M1C William Snead, USNR worked on the MIDN experiment flying on MidSTAR-1. This experiment measures the radiation dose received from 50 million electron volt neutrons at three locations within the spacecraft. MIDN is sponsored by the National Space Biomedical Research Institute; Prof. Vincent Pisacane, Robert A. Heinlein Professor of Aerospace Engineering at USNA, is the principal investigator. Credit USNA Usage Restrictions None License Licensed 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.