Major Areas of Work Status Development Goal Basis for improvement National & International Agency Actions Current plans known. RFI potential high Obtain frequency allocation Early development and groundwork for frequency allocation Band of Frequency for Power Transmission Microwave Try to identify advantages & penalties to other band None known but vital for negotiation & frequency allocation Specific Near-Optimum Frequency for Power Transmission 3.3 GHz Identify advantages & disadvantages of neighboring frequencies Understanding of hardware parameters, ionospheric & tropospheric losses Select Orbital Locations Early station at stable points I23°W (prelim.) Determine how to make most effective use of prime locations Early planning analysis & test will lead to the understanding of the nature of the on-orbit vehicle behaviors. Select Ground Locations In currently to-be-de- veloped areas Early receiving antenna Site - SW desert of U.S. Take ecological advantage of large multiple control power stations with connecting grid approach Advantage afforded by long-range planning. Define Interference Effects & Present Solutions 55db/MHz below fundamental 75dB/MHz for ±25 MHz 100 dB/MHz outside ±200 MHz Tube and filtering design optimization Arrive at Criteria for Policy Decisions To be based primarily on importance of SSPS power Determine approach to minimize impact on other users near fundamental & at harmonics Ecological advantage of SSPS power compared to ecological disadvantage to electromagnetic spectrum allocation & displacement of users Microwave Biological Effects Within acceptable protected work area limits. Outside guard band, within national standards Establish long-term effects & protection req'ts outside normal guard band, establish effects & procedures inside guard bands, particularly for birds No currently known adverse effects within the national standards Environmental Effects Preliminary investigations. 10% inefficiency Assure that atmospheric & other environmental effects are acceptable Low heat generated in process of providing poweK
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