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clutterVolumeRCS

Radar cross-section of volume clutter

    Description

    example

    rcs = clutterVolumeRCS(volrefl,vol) returns the radar cross-section (RCS) of volume clutter defined by the resolution of the radar.

    Examples

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    Estimate the radar cross-section of rain for a side-looking airborne SAR operating in the L band at 1.5 GHz. The rain is specified by a range resolution of 15 m, an azimuth resolution of 18 m, and a rain elevation cell resolution of 20 m. The rain rates are 0.25 mm/hr, 1 mm/hr, 4 mm/hr, and 16 mm/hr.

    f = 1.5e9;
    
    rngres = 15;
    azres = 18;
    elres = 20;
    res = [rngres azres elres];
    
    rr = [0.25 1 4 16];

    Compute the rain radar cross-section. Use rainreflectivity to compute the volume reflectivity of the scattering particles.

    volref = rainreflectivity(f,rr);
    
    rcs = clutterVolumeRCS(volref,res);

    Plot the rain radar cross-section as a function of the rain rate. Express the cross-section in dB.

    semilogx(rr,pow2db(rcs),'.-')
    xlabel('Rain Rate (mm/hr)')
    ylabel('Rain RCS (dBsm)')

    Figure contains an axes object. The axes object contains an object of type line.

    Input Arguments

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    Volume reflectivity of scattering particles in square meters per cubic meter, specified as a scalar or a vector.

    Data Types: double

    Clutter extent, specified as a positive real scalar or a 1-by-3 row vector.

    • If specified as a positive real scalar, vol represents the volume of the clutter in cubic meters.

    • If specified as a 1-by-3 row vector:

      • The first element of vol is a positive real scalar that represents the clutter within the range resolution in meters of the radar.

      • The second element of vol is a positive real scalar that represents the clutter within the azimuth (or cross-range) resolution in meters of the radar.

      • The third element of vol is a positive real scalar that represents the clutter within the elevation resolution in meters of the radar.

    Data Types: double

    Output Arguments

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    Radar cross-section of volume clutter in square meters, returned as a scalar or a vector. rcs has the same dimensions as volrefl.

    Extended Capabilities

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

    Introduced in R2021a