in the receiving area, on the ground and in the air space which the beams traverse. 3.1.1 Nature of Microwave Beam Scientists tell us that a fairly precise pointing of the microwave beam can be achieved with negligible risks in case of aberration. The microwave power flux density would be the greatest in the center and would decrease toward the edges of the . roughly 10 square kilometers diameter beam corridor. It is estimated that beyond 10 kilometers from the beam center the microwave power density would meet the lowest foreign levels set for continued exposure to microwaves. Mesh shielding for workers could be employed within a 10 mile radius about the beam. 3.1.2 Effects of Exposure The danger of microwave exposure with reference to the proposed power density of the microwave beam has been described by one authority in the following terms: "Short exposure would not harm anyone, if he were to walk into the beam...However, one would not want to live there. At the edges of the receiving antenna site the power densities associated with the microwave beam will be well below U.S. permissible level, for continuous exposure to microwave, which is 10 miliwatts per square centimeters, and more than likely they will also meet the Russian levels which are 1,000 times less." Effects of exposure on humans and biota must be determined and found nationally and internationally acceptable under all kinds of potential situations, including effect on workers at the site
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