A Phase-locked phase filter for the minitrack system
National Aeronautics and Space Administration, 1962 - Science - 13 pages
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0.1 percent 0.3 cps bandwidth 0.5 degree/second 100-cps signal 40 db/decade 80 seconds acquisition bandwidth will take capacitor closed-loop frequency response deviations are reduced differential doppler frequency double integration error function filter channel frequency charac gear ratio input channel input response introduce any phase main beam Minitrack phase meter Minitrack Station Minitrack system mode narrower bandwidth narrowest bandwidth noise deviations normal Minitrack normal satellite orbits open-loop transfer function operational amplifier output peak-to-peak percent channel Peru phase detector phase rate PHASE-LOCKED PHASE FILTER postdetection bandwidth potentiometer rad/sec for 0.3 ramp input Record 4 shows reduced to zero resolver phase shifter response channel Ronald F seconds to acquire seconds to cross sensitivity servo amplifier servo motor shaft rotation shift shows a Minitrack shows the system signal strength square wave stability step input strength from 100 system ambiguity SYSTEM by Ronald system error channel tracking system transient velocity feedback wavelength wavelength/second Woodman