Table 4.1. List of Propagation — Meteorology Parameters date sensitivity analysis, particularly short-term power-beam scatter and refraction variations with local area meteorology. For a separate design support application, coherence properties will be provided so as to describe power density variations across the rectenna, and rectenna area terrain effects. This task involves no research; only organizational modification and meteorology parameter relationship definition. These modifications are included in the current EMC tasking. Existing scoring models defining S/l functional degradation for various electromagnetic receivers and electro-optical (EO) devices will be selectively modified to accommodate continuous wave (CW), higher power illumination. This will involve extrapolation of current empirical models and additional simulation; limited sets of effects for a range of minicomputer, microprocessor, and control devices have been initiated. This task also involves no research, and is accommodated in the current EMC program. From considerations of the EMC impact, two alternatives in SPS characteristics are to be noted. These concern modification of the transmission frequency from the current 2.45 GHz principal candidate and the potential for interference reduction through modulation of the power beam. Frequency alternatives all relate to higher bands; 6 GHz through the 33 GHz regions. The EMC advantages primarily accrue in the regions above 10 GHz because of the reduced allocations and specific assignments in the military and civil sectors, and the predominant use of narrow beam antennas relative to electromagnetic systems in the lower spectral regions. Propagation Parameters a. Attenuation b. Rain, hail, particulate scatter c. Refractive anomalies d. Refractive gradients o T o v v o i t-» -rci-I-1 n i Meteorology Parameters a. Temperature and pressure gradients b. Humidity profiles c. Wind profiles d. Turbulence properties
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