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OPEN provides free and publicly available plans for building, testing and operating a versatile, low-cost satellite, based on the standardized CubeSat form-factor.
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OPEN endeavors to reduce the costs and risks associated with educational, government and commercial nano-satellite development. The Open Prototype for Educational NanoSats (OPEN), a proposed nano-satellite development platform, is described in this paper. The cost and complexity of designing and building these satellites remains a vexing complication for many would be CubeSat aspirants. Government supported nano-satellite launch programs and emerging commercial small satellite launch services are reducing the cost of access to space for educational and other CubeSat projects. Latch-up protection circuit is designed for the CMOS processor and at the end a thermal model is presented for the PDM unit. No single component failure in PDM disables or degrades its intended functions that may lead to mission failure. In order to improve reliability and to overcome various failures, redundancy is provided at all levels. PDM is the sub-module of electric power system (EPS) which converts the power distribution bus (PDB) voltage level (unregulated 28V) into the secondary voltage levels and to distribute these voltages to loads according to their requirements. The main focus of the design is modularity, redundancy, design reuse and miniaturization using commercial off the shelf (COTS) components. The paper presents the design of the PDM developed for the Pakistan National Student Satellite-1 (PNSS-1). The power distribution module (PDM) is one of the vital modules onboard small satellites and its design governs the performance of all the subsystems including communication, attitude determination & control, navigation, payload, etc.