Spacecraft requires sufficient power in orbit to perform its mission. So as to comply with system requirements, the sufficient power should be made by a solar cell array by photovoltaic power conversion. A life time of space program depends on its mission considering parts reliability and parts grade. Based on the mission life time, power equipment might be designed to meet specifications. In outer space, solar cell array might generate the dc power by photovoltaic conversion effects and GaInP/GaAs/Ge solar cells are used in this study. Space programs that require more than five years should select parts for high reliability applications. Therefore, reliability analysis for high reliability applications should be performed to check its fulfilment of the requirements. This program should also require more five years for its mission and we performed its analysis using parts count method (PCM) for its reliability. Finally, we performed reliability analysis and obtained quantitative figures found out 99.9%. In this study, we presented the reliability analysis of the 300 W GaInP/GaAs/Ge solar cell array.

1. INTRODUCTION
 2. 300 W SOLAR CELL ARRAY
  2.1 Solar Cell Array Configuration
  2.2 Design of 300 W Solar Cell Array
 3. RELIABILITY ANALYSIS OF THE 300 W SOLARCELL ARRAY
  3.1 Parts List for Reliability Analysis
  3.2 Reliability Prediction
 4. RESULTS AND DISCUSSION
 5. CONCLUSIONS
 REFERENCES

• Goo-Hwan Shin(Satellite Technology Research Center, Korea Advanced Institute of Science and Technology) Corresponding Author
• Se-Jin Kwon(Department Aerospace Engineering, Korea Advanced Institute of Science and Technology)
• Hu-Seung Lee(Department of Mechanical and Metallurgical Engineering Education, Chungnam National University)