## A demodulation system for vector measurements from a spinning satellite |

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AERONAUTICS AND SPACE Ames Research Center amplifier amplitude arbitrary axis of sensitivity band of frequencies board a spinning carrier frequency Channel cos(2cot cp and H(t)cos cp)cos cot cp)sin cot data frequencies Data transmission demodulating oscillator demodulation system Demodulation waveforms diagram filter frequency content H(t)cos cp H(t)cos(cot H(t)sin cp input data input information input signal input with frequency Kerwin and Robert lower sideband magnetic field measuring instrument modulated carrier modulated data Modulated Input modulating oscillator Moffett Field mounted on board Munoz Ames Research NATIONAL AERONAUTICS orthogonal components output of multiplier output of sensor peak detector periodic input phase-lock quency recovered reference direction reference signal Robert Munoz Ames SATELLITE By William satellite spin show the outputs shown in figure SPACE ADMINISTRATION spin frequencies spin-modulated data spinning platform SPINNING SATELLITE synchrodyne technique SYSTEM FOR VECTOR TWO-PHASE DEMODULATION TECHNIQUE two-phase oscillator vector components VECTOR MEASUREMENTS waveforms for periodic waveforms of figures