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Range-dependent eclipsing factor

Since R2021a



    FECL = eclipsingfactor(R,DU,PRF) computes the range-dependent eclipsing factor FECL in decibels, given unambiguous range R duty cycle for a simple rectangular pulse or vector of samples from an arbitrary waveform DU and pulse repetition frequency PRF.


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    Calculate the range-dependent eclipsing factor at 1 km intervals between zero and the unambiguous range, R, assuming an unmodulated rectangular pulse with a duty cycle of 0.1 and the pulse repetition frequency of 1000 Hz.

    DU = 0.1;
    PRF = 1e3;
    R = 0:1000:time2range(1/PRF);
    FECL = eclipsingfactor(R,DU,PRF);

    Plot the range-dependent eclipsing factor.

    xlabel('Range (km)');
    ylabel('Eclipsing Factor (dB)');
    ylim([-25 1]);
    grid on;
    title('Range-Dependent Eclipsing Factor');

    Input Arguments

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    Range at which to compute the eclipsing factor, specified as a positive scalar or as a length-J vector in meters.

    Duty cycle, specified as a nonnegative scalar in the range [0,1] or length-M vector with each element in the range [0,1].

    • If you specify DU as a scalar, the eclipsing factor is computed for an unmodulated rectangular pulse with the specified duty cycle.

    • If you specify DU as a length-M vector, the eclipsing factor is computed for a waveform, using time domain samples taken over a one-pulse interval.

    Pulse repetition frequency, specified as a positive scalar or as a length-K vector in Hz.

    Output Arguments

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    Eclipsing factor, returned as a J-by-K matrix in decibels with rows corresponding to the ranges in R and columns corresponding to the values in PRF.

    Extended Capabilities

    C/C++ Code Generation
    Generate C and C++ code using MATLAB® Coder™.

    Version History

    Introduced in R2021a