Downloading Data from a GPS Station (IMAGE) NASA/Goddard Space Flight Center Caption NASA researcher Ryan Walker (left) downloads data from a GPS station he and Christine Dow installed on the Nansen Ice Shelf two weeks prior. Credit Credits: NASA/Christine Dow 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.