2) Parametric designs are preferred over one-point designs. 3) The results of the study must be presented in a clear, readable and intelligent fashion. Graphics should be employed wherever possible, and in particular the selected SPS configuration should be illustrated. 4) Recognizing that funding and time constraints will preclude fully optimizing the design, "best engineering judgment" should be used for design decisions. 5) The study conclusion should include a list of potential problem areas or areas in which insufficient effort has been expended to achieve a reasonable level of confidence in the proposed design configuration. 6) The study should not address environmental issues associated with the energy beam, and for this reason, if a microwave beam is used, the power density at the surface must not exceed 2 2 30 mW/cm , or if a laser is used, 200 mW/cm . 7) The conclusions should include a list of recommendations for further study and logical next steps. This may include a list of possible developmental items. 8) The final design must reasonably be expected to be able to withstand the rigors of the geostationary orbit environment, including the thermal shock of eclipses and the energetic charged particle and plasma environments. 9) SI (MKS) units shall be used throughout. J. REPORTING REQUIREMENTS Periodic progress payments will be negotiated between SSI and the contractor. Payments will be contingent upon receipt of timely reports on the progress
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