We introduce the development of a robust ground-based synthetic aperture radar (GB-SAR) system capable of obtaining highly accurate SAR images of surface targets repeatedly by dedicated efforts for accurate motion control and innovative system design for stable RF acquisition. A brief introduction of the GB-SAR system and some test images will be followed by the accuracy assessment of the syste...

Atmospheric phenomena often leave fingerprints on the sea surface, which are detectable by synthetic aperture radar (SAR). Here we present some representative examples of SAR images acquired by the Advanced Synthetic Aperture Radar (ASAR) onboard the Envisat satellite over the South China Sea (SCS) which show radar signatures of atmospheric gravity waves (AGWs) and of coastal wind fields. On SA...

Because of all-weather working ability, sensitivity to biomass and moisture, and high spatial resolution, Synthetic aperture radar (SAR) satellite images can perfectly complement optical images for pasture monitoring. This paper aims to examine the potential of the integration of COnstellation of small Satellites for the Mediterranean basin Observasion (COSMO-SkyMed), Environmental Satellite Ad...

Multi-channel radar systems allow for overcoming the inherent limitation of conventional synthetic aperture radar (SAR). An example is the combination of digital beamforming on receive in elevation with multi-aperture SAR signal reconstruction in azimuth which enables high-resolution wide-swath imaging [1]. As a next step, focus is turned to advanced concepts for the imaging of even wider swath...

A hitchhiker is a passive radar receiver that relies on sources of opportunity to perform radar tasks.1–4 In this paper, we consider a synthetic-aperture radar (SAR) system with static non-cooperative transmitters and mobile receivers traversing arbitrary trajectories and present an analytic image formation method. Due to its combined synthetic aperture and hitchhiking structure, we refer to th...

Synthetic Aperture Radar (SAR) and optical images contain different types of land cover information. Moreover, whereas like-polarisation SAR images are predominately influenced by surface backscattering properties, the volume backscattering characteristics of surfaces are well represented by SAR cross-polarisation data. Hence, combined use of likeand cross-polarisation data could enhance the la...

Synthetic Aperture Radar (SAR) imaging algorithm for the moving targets with some motion irregularities are investigated. For accurate SAR imaging of the moving targets, position and the velocity of the object according to the radar platform must be known accurately. To calculate the instantaneous range and velocity of the object, local radar platform with one transmitter-two receiver (OT-TR) i...

MIT Lincoln Laboratory is investigating the detection and identification of stationary ground targets in high resolution, fully polarimetric, synthetic aperture radar (SAR) imagery. This paper: (1) provides a brief description of the Lincoln Laboratory SAR, (2) describes an optimum polarimetric processing technique used to construct minimum-speckle SAR intensity imagery, and (3) presents an exa...

We propose an enhanced image reconstruction method for spotlight-mode synthetic aperture radar (SAR). Our approach involves extension of feature preserving regularization techniques developed in other applications to the complex-valued SAR imaging problem. Compared to conventional image formation schemes, our approach offers increased resolvability of point-scatterers, enhancement of object sha...

The aim of this study was to develop an inversion approach to estimate surface soil 19 moisture from X-band SAR data over irrigated grassland areas. This approach simulates a 20 coupling scenario between Synthetic Aperture Radar (SAR) and optical images through the 21 Water Cloud Model (WCM). A time series of SAR (TerraSAR-X and COSMO-SkyMed) and 22