 Backup batteries store solar energy to power the aircraft at night.A small Airborne Real-Time Imaging System (ARTIS) camera, developed by HyperSpectral Sciences, Inc., under ERAST project, was flight demonstrated during the summer of 1999 on board the Scaled Composites Proteus aircraft when it took visual and near-infrared photos from Proteus while it was flying high over the Experimental Aircraft Association's AirVenture 99 Airshow at Oshkosh, Wisconsin.The images were displayed on a computer monitor at the show only moments after they were taken.