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sarintang

Coherent integration angle for SAR

    Description

    example

    ciang = sarintang(lambda,azres) returns the coherent integration angle, ciang, through which the target is viewed during the coherent processing aperture.

    example

    ciang = sarintang(lambda,azres,azb) specifies the azimuth impulse broadening factor, azb, due to data weighting or windowing for sidelobe control.

    Examples

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    Estimate the coherent integration angle of a side-looking airborne synthetic aperture radar (SAR) with an operating frequency of 10 GHz and a cross-range resolution of 1 m. Assume the azimuth broadening factor to be 1.3.

    f = 10e9;
    azres = 1;
    azb = 1.3; 

    Compute the coherent integration angle.

    lambda = freq2wavelen(f);
    ciang = sarintang(lambda,azres,azb)
    ciang = 1.1165
    

    Input Arguments

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    Radar wavelength in meters, specified as a positive real scalar or a vector.

    Data Types: double

    Image azimuth or cross-range resolution in meters, specified as a positive real scalar or a vector.

    Data Types: double

    Azimuth impulse broadening factor, specified as a positive real scalar. azb expresses the actual –3 dB mainlobe width with respect to the nominal width. Typical window functions like hamming and hann exhibit azb values in the range from 1 to 1.5.

    Data Types: double

    Output Arguments

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    Coherent integration angle in degrees, returned as a matrix. The rows in ciang correspond to the wavelengths in lambda and the columns correspond to the resolution in azres.

    Extended Capabilities

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

    Introduced in R2021a