We report the observation of a new type of helicity-dependent photocurrent induced by an in-plane transverse direct electric current in an InAs quantum well. The amplitude of the photocurrent depends linearly on the transverse current. Moreover, the observed incident azimuth-angle dependence of this photocurrent is different from that induced by the circular photogalvanic effect. This new photo...

The Ingara X-band fully-polarimetric medium grazing angle sea clutter data set was collected in the Australian maritime environment over an angular range of 360◦ in azimuth and 15◦ to 45◦ in grazing. This paper reports further analysis of this data set, focussing on understanding the azimuth variation to enable improved simulation accuracy and extraction of relevant geophysical parameters. This...

Directional surface reflectance is defined as the ratio between the radiance measured in specific observation geometry (zenith and azimuth) and a direct source of illumination (zenith and azimuth) in an infinitely small solid angle. The directional surface reflectance is determined from satellite observations though the atmospheric correction process. When properly retrieved, the directional re...

Moon-Sik Lee 837 This paper proposes robust source localization methods for estimating the azimuth angle, elevation angle, velocity, and range using a low-complexity planar antenna array in impulsive non-Gaussian noise environments. The proposed robust source localization methods for wireless communication applications are based on nonlinear M-estimation provided from Huber and Hampel. Simulati...

A new approach of imaging reconstruction of concealed PEC targets in a dielectric closed box, using azimuth multi-angle measurements, is developed. As the broadband stepped-frequency radar transmits planar wave from different azimuth directions around the target, the backscattered electrical fields in both the amplitude and phase are obtained. The two-dimensional fast Fourier transform (2D-FFT)...

In this paper, the problem of two-dimensional (2D) direction-of-arrival (DOA) estimation with parallel linear arrays is addressed. Two array manifold matching (AMM) approaches, in this work, are developed for the incoherent and coherent signals, respectively. The proposed AMM methods estimate the azimuth angle only with the assumption that the elevation angles are known or estimated. The propos...

Dip moveout (DMO) and azimuth moveout (AMO) are considered in a general framework that allows for lateral variations in the velocity model, including those which generate caustics in the wavefield. DMO and AMO are constructed through the composition of operators, using the scattering angle and azimuth parameterization. In this parameterization, impulse responses are computed in a gaussian gas l...

The results of experiments in developing a method for extracting three-dimensional information from a scene by means of a polarimetric passive imaging sensor are summarized. This sensor provides a full Stokes vector at each sensor pixel location from which degree and angle of linear polarization are computed. The angle of linear polarization provides the azimuth angle of the surface normal vect...

Conventional differential interference contrast (DIC) microscope shows the two-dimensional distribution of optical phase gradient encountered along the shear direction between two interfering beams. Therefore, the contrast of DIC images varies proportionally to the cosine of the angle made by the azimuth of the phase gradient and the direction of wavefront shear. The image contrast also depends...