Ground moving target indication (GMTI) for synthetic aperture radar (SAR) provides information on non-static objects in radar imagery of a static ground scene. While general applications cover a wide area of topics from ocean current measurements to glacier ice flow, millimeter wave (mmW) SAR is well suited for traffic monitoring, reconnaissance, and identification of special target movements i...

This article presents the analysis of the Bragg scattering phenomenon which has been observed in the images of machineplanted rice paddies acquired by the JERS-1 L-band synthetic aperture radar (SAR). The simultaneous measurements of rice plants were made at the SAR data acquisition times. Large differences of 20–25 dB in image intensity between the transplanting and ripening stages are found t...

This paper presents a new ground penetrating radar (GPR) design approach using orthogonal frequency division multiplexing (OFDM) and compressive sensing (CS) algorithms. OFDM technique is applied to leverage GPR operating speed with multiple frequency tones transmission and receiving concurrently, and CS technique allows utilizing reduced frequency tones without compromising data reconstruction...

Intensive research is currently ongoing in the field of Smart Multi-Aperture Radar Technique (SMART) for Synthetic Aperture Radar (SAR). This work investigates the performance of the SMART SAR system for highresolution wide-swath imaging based on Scan-onReceive (SCORE) algorithm for receive beam steering. SCORE algorithm works under model mismatch conditions in presence of topographic height. A...

In this paper, we present a novel signal processing method for video synthetic aperture radar (ViSAR) systems, which are suitable for operation in unmanned aerial vehicle (UAV) environments. The technique improves aspects of the system’s performance, such as the frame rate and image size of the synthetic aperture radar (SAR) video. The new ViSAR system is based on a frequency-modulated continuo...

Abstract—Circular synthetic aperture radar (CSAR) is different from other usual SAR modes, e.g., Stripmap SAR or Spotlight SAR, which takes a circular path rather than a straight path. It can provide not only two-dimensional (2-D) high resolution images but also threedimensional (3-D) information about the target. In this paper, 2D CSAR imaging containing 3-D information about the target is dis...

Modern radar systems equipped with agile-beam technology support multiple modes of operation, including, for example, tracking, automated target recognition (ATR), and synthetic aperture radar imaging (SAR). In a multimode operating environment, the services compete for radar resources and leave gaps in the coherent collection aperture devoted to SAR imaging. Such gapped collections, referred t...

In the past decade several satellite borne synthetic aperture radars (SAR) have been put into orbit. A synthetic aperture radar (SAR) not only records the intensity of the returned signal, but also the phase history of the backscattered radar signal and is processed to high spatial resolution images. To observe the structure of tropical cyclones at the sea surface ENVISAT ASAR and RADASAT 1 Sca...

Crop classification is a key issue for agricultural monitoring using remote-sensing techniques. Synthetic aperture radar (SAR) data are attractive for crop classification because of their all-weather, all-day imaging capability. The objective of this study is to investigate the capability of SAR data for crop classification in the North China Plain. Multi-temporal Envisat advanced synthetic ape...

We introduce from first principles a synthetic aperture radar (SAR) imaging and target motion estimation method that is combined with compensation for radar platform trajectory perturbations. The main steps of the method are (a) segmentation of the data into properly calibrated small apertures, (b) preliminary motion estimation from the data using the Wigner transform and the ambiguity function...