A Geodetic GPS Sensor (IMAGE) University of Bonn Caption A geodetic GPS sensor obtains more precise measures of antenna height due to absence of cars in the neighboring parking lot during the lockdown. Credit © Makan A. Karegar Usage Restrictions This image may be used together with the press release. 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.