Optimal Sizing of a Photovoltaic-Hydrogen Power System for HALE Aircraft by means of Particle Swarm Optimization
Input data used for the cases of study.
Mass of control, energy manage, and communication system
Days of the year
Hours of a day
Solar constant (ASTM E-490)
Drag coefficient (20 km altitude, 29.49 m/s level flight velocity and 155185 Re number) 
Ratio of lift-drag (20 km altitude, 29.49 m/s level flight velocity and 155185 Re number) 
Efficiency of propulsion system
Efficiency of photovoltaic system
Mass density of solar cells
Specific power density of URFC
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