- Wed, 23 Jan 2008 at 11:02 am · Alexei Karpenko shares with us his HALO (High ALtitude Object) project, which demonstrates a sophisticated home-built sensor payload that integrates with Google Earth. A must-see for anyone interested in mid to high-altitude balloon and UAV acquisition systems. (Frank Taylor at Google Earth Blog has also included a well-rounded write-up of the HALO project. — Thanks, Frank!) · (0)