Space Solar Power Review. Vol 11 Num 3&4. 1992

Laser Station: • Transportation of limited diffraction, large-diameter laser beams through turbulent atmosphere by means of laser request and phase conjugation, Phasing of the complex multi-element optical system up to the diffraction limit by PCM's, • High-precision, additional deflection of the phase-conjugated laser beam relative to the reference direction, • Limited diffraction phasing of the multi-channel laser aperture, with large optical path-length difference, • Diode-pumped, solid-state lasers as a basis for the efficient multi-channel laser. As a first step in the actual design of such a power supply system, a large-scale experiment to integrate present technology should be carried out. (The experimental development of the laser request from orbit and transmission of laser energy to the satellite under real life conditions and using an average, moderate power laser, studying dynamic processes, and the production of the design information for a full-scale system). This experiment could be carried out over a period of two years. Restoration of the Ozone Layer The regeneration of the ozone in the upper layers of the atmosphere could be based on two different methods: a) the usual preparation of ozone and its delivery to the upper layers of the atmosphere, b) ozone production directly inside the upper layers of the atmosphere. Our scientific and technical analysis shows that both methods are very difficult to put into practice, but both of them are nonetheless feasible. The first method has at least one major advantage which consists in a more effective production of ozone using a ground-based, well-developed facility (less total energy — production and transport of ozone to upper atmosphere is easier). It avoids heavy, on board equipment of flying platforms. The second method deals with free ozone production, without it being necessary to have large volumes of ozone on a long-term basis. This method allows us to avoid certain difficulties arising from the unusual properties of ozone (eg. its explosive nature when in concentrated form). The second method exists in several versions and two of them are major ones:

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