Space Station solar array

Space station solar array configurations and power system technologies were compared. Planar silicon arrays offer low technology risk but high weight and drag area. Concentrator arrays of silicon or gallium arsenide (preferred) promise lower cost and drag area but increase technology risk. Planar and power tower require fewer control moment gyros (CMG's). Delta is more rigid but requires more CMG's. Flexible body effects are not significant. All configurations can be assembled. Power tower is preferred for proximity operations. All configurations require 6 to 8 launches. Manned operations after two to three. All configurations can accommodate all candidate electrical power systems options.