Optical altimeter receiver systems study and design for a spaceborne laser altimeter, Volume 1521
Howard C. Salwen, Herbert G. Coles, David R. Torrealba, Adcom, inc, Electronics Research Center (U.S.)
National Aeronautics and Space Administration, 1970 - Technology & Engineering - 59 pages
This report investigates the design and specifications for optical altimeter receiver systems.
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2nd Order Loop 3rd order system acquisition Adder analog assumed background photons bias offset Buffer circuit compensation network counter delay fluctuations digital filter dynamic performance effect of background error signal factor gate width given implementation integrator iteration lag error Laser Altimeter late halves leading-edge tracker loop filter loop gain loop integration loop noise bandwidth main loop MSL altimeter nanoseconds nsec number of photons number of signal optimum gate performance obtainable phase detector phase-locked loop photodetector photomultiplier photon arrivals photon count photon rate photon returns poisson distributed program loop pulse shape pulse train pulse width random range error range uncertainty rate-aiding received pulse retroreflectors sampling interval sampling rate satellite Scaler second order loop shown in Fig signal photons simulated Split Gate Split-Gate Tracking steady-state error subroutine technique third order loop third order system transfer function two-way range velocity