SPACE POWER SATELLITE BRIEFING DOCUMENTRADIO AND OPTICAL ASTRONOMY EFFECTS INTRODUCTION This briefing document was prepared for participants in a workshop on Satellite Power System (SPS) effects on optical and radio astronomy held May 1979 in Seattle, Washington. The document draws much of its information from, and is meant to be used in conjunction with, the SPS Reference System Report, D0E/ER-0023, dated October 1978. The aim of this Briefing Document is to collect information relevant to SPS effects on optical and radio astronomy, to present the information in a manner that is both useful to the astronomical observing communities, and is as independent as possible of future changes in the SPS design. In most cases, the numerical quantities of greatest interest are not given in the Reference System Report and had to be calculated or estimated based on information that was available. In such cases, the numbers were calculated in the simplest manner consistent with a useful result. Results of more than one significant figure are seldom offered for a quantity. Greater emphasis has been given to the identification of qualitative effects, and some effects are mentioned for which no magnitude estimate is currently available. In view of probable SPS design changes and uncertainties in the properties of some system components, it is important to regard the information presented here as reference numbers used to focus discussion, and not as definitive results. These same uncertainties mean that the most useful and influential statements on SPS effects will be those phrased in one of two ways: they either should be parametric in the level of SPS emission or should offer design criteria to be observed if corresponding effects are to be avoided. Persons evaluating SPS effects are encouraged to report their conclusions in one of these two forms whenever possible.
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