Staggered SAR is an innovative synthetic aperture radar (SAR) concept, where the pulse repetition interval (PRI) is continuously varied. This, together with digital beamforming (DBF) in elevation, allows high-resolution imaging of a wide continuous swath without the need for a long antenna with multiple azimuth apertures. As an additional benefit, the energy of range and azimuth ambiguities is spread over large areas: Ambiguities therefore appear in the image as a noise-like disturbance rather than localized artifacts. An analytical expression for the range-ambiguity-to-signal ratio (RASR) in staggered SAR is provided and a novel method for the estimation of the azimuth ambiguity-to-signal ratio (AASR) is proposed. A C-band design example based on a planar antenna is shown as well. The impact of staggered SAR operation on image quality is further assessed using highly oversampled F-SAR airborne data.


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    Title :

    Ambiguities and Image Quality in Staggered SAR


    Contributors:

    Conference:

    2015 ; Marina Bay Sands, Singapore


    Publication date :

    2015


    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English





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