Solar Balloon for infrasound observation (IMAGE) DOE/Sandia National Laboratories Caption A Sandia National Laboratories solar-powered hot air balloon taking flight bears sensors including a GPS tracker and reusable infrasound sensor. This flight supported past infrasound research at Sandia Credit Photo courtesy of Sandia National Laboratories Usage Restrictions For use with news 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.