Table 4B.4. SPS Impact on the Pilot and Power Beams Table 4B.5. Development of Advanced Ground-Based Heater Facilities Title of Effort Objective Benefit to SPS Ionospheric Effects on the Stability of the SPS Pilot Beam Determine phase and amplitude variations across the SPS array due to changes in the ionosphere occurring both naturally and as a result of heating. Will provide information for the SPS phase control system, for the Pilot Beam pointing accuracy and on sidelobe levels. Ionospheric Effects on the SPS Power Beam Determine the energy, its magnitude and distribution scattered out of the power beam by ionospheric variations Will provide information needed to assess overall transmission efficiency of the SPS. Will also provide information needed to address the potential for RFI. Combined Pilot/Power Beam Test Determine the uplink phase and amplitude variation on the pilot signal and interpret the resulting return signal. Will provide a true test of uplink phase changes and the actual impact on a regenerated signal. Title of Effort Objective Benefit to SPS Development of a Higher Power Heater at Arecibo Build and construct a higher power heater at Arecibo, P.R., for use in SPS simulation studies. Will provide a facility to supply SPS equivalent energy density to the F-region of the ionosphere for underdense heating. Development of a Higher Power Heater at Platteville Build and construct a higher power heater at Platteville for use in SPS telecommunication simulation studies. Will provide a facility to supply SPS equivalent energy density to the F-region of the ionosphere for underdense heating.
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