The authors consider some concerns regarding a technique of narrowband synthetic aperture radar imaging (N-SAR), called coherent Doppler tomography (CDT), which may be a good candidate spaceborne applications. Using a single frequency signal, resolution of two tenths of a wavelength can be achieved in the point spread function if the radar platform circles the ground patch to be imaged. However, the high sidelobe level of -8 dB in the point spread function results in an unacceptable dynamic range. To reduce the sidelobe level, two approaches are presented: coherent processing using multiple discrete frequencies and noncoherent subaperture processing. Simulation results demonstrate that the sidelobe level is substantially reduced by both methods. However, the resolution is degraded and the computational overhead is greatly increased for noncoherent subaperture processing. A possible satellite geometry configuration which could utilize N-SAR processing to provide high-resolution global mapping capability is presented.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Coherent Doppler tomography-a technique for narrow band SAR


    Additional title:

    Kohärente Doppler-Tomographie, eine Technik für das Schmalband-SAR (synthetische Apertur-Radar)


    Contributors:
    McCoy, J.W. (author) / Magotra, N. (author) / Chang, B.K. (author)


    Publication date :

    1990


    Size :

    5 Seiten, 7 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Coherent Doppler tomography-a technique for narrow band SAR

    McCoy, J.W. / Magotra, N. / Chang, B.K. | IEEE | 1991


    Coherent Doppler lidar edge technique

    Werner, C. / Optical Society of America | British Library Conference Proceedings | 1995




    COHERENT OPTICAL DOPPLER ORBITOGRAPHY

    Schediwy, Sascha / Dix-Matthews, Benjamin / Gozzard, David et al. | TIBKAT | 2021