Two NASA AFriSAR Research Aircraft (IMAGE) NASA/Goddard Space Flight Center Caption The two NASA AFriSAR research aircraft: the B-200 airplane (left) carries a laser altimeter, while the C-20A aircraft (right) transports a radar. Both instruments collect measurements of surface topography and vegetation structure, creating 3D maps of their targets. Credit NASA 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.