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aperture2swath

Swath extent for radar on ground plane

Since R2021a

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    Syntax

    [swlen,swwidth] = aperture2swath(r,lambda,d,grazang)

    Description

    [swlen,swwidth] = aperture2swath(r,lambda,d,grazang) returns the swath length and width for a radar system at its maximum extent, assuming a flat Earth.

    example

    Examples

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    Open Live Script

    Estimate the maximum swath length and width of side-looking airborne synthetic aperture radar (SAR) operating at 16.7 GHz for a target range of 10 km. The radar has an aperture length of 3 m in the elevation dimension and of 4 m in the azimuth dimension. Assume a nominal grazing angle of 30∘.

    lambda = freq2wavelen(16.7e9);
R = 10e3;

elaz = [3 4];

grazang = 30;

    Compute the swath length and the swath width.

    [swl,swwid] = aperture2swath(R,lambda,elaz,grazang)
    swl = 
119.6776

    swwid = 
44.8791

    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

    Antenna dimensions in meters, specified as a positive real scalar or a 1-by-2 row vector.

    • If you specify d as a two-element vector, the first element of d represents the antenna dimension in elevation and the second element represents the antenna dimension in azimuth.

    • If you specify d as a scalar, aperture2swath assumes the antenna has equal elevation and azimuth dimensions.

    Data Types: double

    Grazing angle in degrees, specified as a scalar in the range [0, 90].

    Data Types: double

    Output Arguments

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    Swath length and width in meters, returned as matrices.

    • The rows of the swath length swlength correspond to the range values in r. The columns of swlength correspond to the wavelength values in lambda.

    • The rows of the swath width swwidth correspond to the range values in r. The columns of swwidth correspond to the wavelength values in lambda.

    The swath width also corresponds to the azimuth or cross-range resolution of a real aperture antenna.

    Extended Capabilities

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

    Version History

    Introduced in R2021a

    See Also

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