1. Costs and benefits of satellite-based tools for irrigation management
2. Of Defunct Satellites and Other Space Debris
3. History of solar flight
4. High-Altitude Platforms - Present Situation and Technology Trends
5. 5Noll, T. E., Brown, J. M., Perez-davis, M. E. Ishmael, S. D., Tiffany, G. C., and Gaier, M. “Investigation of the Helios Prototype Aircraft MishapVolumeI Mishap Report National Oceanic and Atmospheric Administration and,” Tech. Rep. January, NASA, 2004.