The maneuvering, station keeping, natural forces, attitude stabilization and control functions will involve reaction engines in various locations around the station. The propellants from these engines may form an atmosphere and particulates that would be deleterious to the open cathode of the DC to RF converters. Understanding the associated flight mechanics for this application in particular is a new area of technology. A risk rating of 4 should apply. The concept is to design and develop the operational equipment and maintenance equipment so that after deployment, whether on orbit or on the ground, the maintenance function would be one of monitoring, controlling, adjusting, de-installing a module and installing a replacement. These would be done remotely for on orbit equipment and for ground equipment where they were repetitious functions insofar as this approach would lead to better economy, low risk and be generally beneficial. Provisions would also be developed and deployed to permit more close participation by man. When equipment is known in some detail, the operations & maintenance functional considerations will be developed in parallel. This is an area of considerable unknowns at this time and should be in the risk rating 4 category. Outgassing and particulate matter from the power source may interact adversely with the open cathodes of the DC to RF converters. It may also be that the fields between and around high voltage conductors will introduce phenomena that affect the operation, life, reliability & safety. Leakage of fluids that may be internal to the equipment and outgassing or vapor pre>sur associated with non-metallics in particular must be investigated critically for this application. As a part of the power sources set of technology issues the above indicate unknown technology areas that would interact with the orbital microwave system. A risk rating of 4 should apply.
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