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sarazres

Azimuth or cross-range resolution for SAR

    Description

    example

    azres = sarazres(r,lambda,synlen) returns the azimuth or cross-range resolution for the synthetic aperture.

    example

    azres = sarazres(___,Name,Value) specifies additional options using name-value arguments.

    Examples

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    Estimate the azimuth resolution of a side-looking airborne SAR operating in broadside at a wavelength of 0.03 m for a target range of 10 km. The radar has a synthetic aperture length of 195 m and a range impulse broadening factor of 1.3.

    lambda = 0.03;
    len = 195;
    R = 10e3;
    azb = 1.3;

    Compute the azimuth resolution for the synthetic aperture.

    synazres = sarazres(R,lambda,len,'AzimuthBroadening',azb)
    synazres = 1.0000
    

    Input Arguments

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    Range from target to antenna in meters, specified as a positive real scalar or a vector.

    Data Types: double

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

    Data Types: double

    Synthetic aperture length in meters, specified as a scalar.

    Data Types: double

    Name-Value Arguments

    Specify optional comma-separated pairs of Name,Value arguments. Name is the argument name and Value is the corresponding value. Name must appear inside quotes. You can specify several name and value pair arguments in any order as Name1,Value1,...,NameN,ValueN.

    Example: 'AzimuthBroadening',1.2,'CoherentIntegrationAngle',0.3

    Azimuth impulse broadening factor due to data weighting or windowing for sidelobe control, specified as a positive real scalar. This argument expresses the actual –3 dB mainlobe width with respect to the nominal width. Typical window functions like hamming and hann exhibit values in the range from 1 to 1.5.

    Data Types: double

    Coherent integration angle in degrees, specified as a scalar in the range [0, 180]. This argument specifies the angle through which the target is viewed during the coherent processing aperture.

    Data Types: double

    Doppler cone angle in degrees, specified as a scalar in the range [0, 180]. This argument identifies the direction toward the scene relative to the direction of motion of the array.

    Data Types: double

    Output Arguments

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    Azimuth or cross-range resolution in meters, returned as a matrix. The rows of azres correspond to the range values in r and its columns correspond to the wavelength values in lambda.

    Extended Capabilities

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

    Introduced in R2021a