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SAR Tomography (TomoSAR) regards multi-baseline observation data as array observation data and realizes three-dimensional imaging by applying direction of arrival (DOA) estimation processing. To improve angular resolution of the TomoSAR with suppressing ambiguity, many repeat-pass data are required. However, it is often difficult to increase the number of data because of the cost. In this paper, we...
This paper presents an improvement of the vertical resolution of a ground penetrating radar (GPR) image. The near-field calibration is employed to reduce the antenna effects including variation in the antenna response and coupling between transmitting and receiving antennas. The simulations with a scenario of the detection of an object buried under the ground are conducted. The ground surface affects...
This paper presents an investigation of the effect of the antenna frequency band on the ground penetrating radar (GPR) image resolution. The investigation is achieved through simulations. In the simulations, two Scutcheon antennas are modeled as the receiving and transmitting antennas. A cross-shaped object is buried under the ground constructed with the dielectric material. The Gaussian pulses with...
With the continuous improvement of the SAR resolution, image formation signal processing becomes a challenging problem. In this paper, image formation signal processing including image formation algorithm, motion compensation and autofocus are discussed. Processing results of real data collected by an ultra-high resolution SAR are presented to verify the effectiveness of the proposed method.
With the development of spaceborne synthetic aperture radar (SAR), the high resolution has become a hot topic again in recent years. However, the higher the resolution is, the worse the accuracy of the traditional hyperbolic range model (HRM) gets. In the case of ultra-high resolution spaceborne SAR, the curved orbit should be taken into account. To overcome this problem, we present a modified data-focusing...
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