In-orbit performance of Hughes HS601HP dual junction GaInP2/GaAs/Ge solar arrays

Abstract

Hughes Space and Communication Company's body-stabilized HS601HP communications satellites represent the first commercial spacecraft to utilize dual junction GaInP 2 /GaAs/Ge solar cells as their primary power source. The in-orbit electrical performance of four of these spacecraft has been monitored and compared to ground-based predictions. The predictions employ the as-built solar array configuration and electrical performance, the actual in-orbit radiation environment, and additional predicted environmental factors. Hughes' manufacturing and prediction methodology has led to agreement between the average telemetered and predicted power of ±2% for these spacecraft.