sarazres

Azimuth or cross-range resolution for SAR

Since R2021a

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    Syntax

    azres = sarazres(r,lambda,synlen)
    azres = sarazres(___,Name,Value)

    Description

    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.

    example

    Examples

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    Open Live Script

    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

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    Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding value. Name-value arguments must appear after other arguments, but the order of the pairs does not matter.

    Before R2021a, use commas to separate each name and value, and enclose Name in quotes.

    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

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

    Version History

    Introduced in R2021a

    See Also

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