A radar signal image superimposed on an overhead photo of a large steel scultpure, plus a photo of a student-built radar system.

A synthetic aperture radar (SAR) image of Alexander Calder’s sculpture La Grande Voile, generated by one of the student laptop-based radar systems. (Radar system photo and overlaid SAR image courtesy of the students, used with permission. Underlying Google Maps satellite image © Google and GeoEye, all rights reserved, excluded from our Creative Commons license; for more information, see http://ocw.mit.edu/fairuse.)