TY - RPRT TI - High Altitude Long Endurance UAV Analysis Model Development and Application Study Comparing Solar Powered Airplane and Airship Station-Keeping Capabilities AU - Ozoroski, Thomas A. AU - Nickol, Craig L. AU - Guynn, Mark D. PY - 2015 UR - https://ntrs.nasa.gov/citations/20150001258 ID - 20150001258 ER -