CONTRIBUTION OF ETCA After analysis of the Powersat Technology Demonstrator Options document, our personal opinion will be that the optimum option for the first Demonstration programme will be the “ARIANE 4 Small Satellite". This established fact will be based on the following considerations: Very Great number of mission opportunities The advantage will be to achieve the first demonstrator programme in a very short time and to start, without delay, a second demonstrator with a more ambitious programme including : * higher power * space-Earth link * New technology for power source, power conditioning, thermal control, etc... This new demonstrator would be implemented on the Space Station or HERMES shuttle [for example]. Transparency to other pay loads This is essential for the simplicity of the mission and, of course, the low- cost approach. Programs such as Eureca and the US shuttle, with respect to the
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