This paper presents a new methodology to retrieve slant-range velocity estimates of moving targets inducing Dopplershifts beyond the Nyquist limit determined by the pulse repetition frequency (PRF ). The proposed approach exploits the linear dependence (not subject to PRF limitations) of the Doppler-shift with respect to the slant-range velocity, at each wavelength. Basically, we propose an alg...

Aiming at the problem of poor spatial resolution low-frequency noise sources in a small-aperture spherical microphone array (SMA), this paper proposes method for localizing and identifying based on virtual-vector open SMA (‘p+v’ joint processing pressure velocity). Firstly, virtual with larger aperture is obtained using extrapolation method. In method, actual are regarded as dual-radius SMA, ve...

Nomenclature SF a , SFx a , SF y a , SFz a = specific force acceleration vector (sensed by accelerometers) and components in frame B B = sensor (body) coordinate frame aligned with strapdown inertial sensor axes 1 m B  = frame B orientation at computer cycle 1 m  () Bt = frame B orientation at time t k r c = combination, k elements selected from a set of r elements without regard to the order...

We outline a general methodology to infer the inductive velocity field vector in solar active regions. For the first time, both the field-aligned and the crossfield velocity components are reconstructed. The cross-field velocity solution accounts for the changes of the vertical magnetic field seen between a pair of successive active-region vector magnetograms via the ideal induction equation. T...

In the present paper, the Zelt algorithm has been extended for ray tracing through an anisotropic model. In anisotropic media, the direction of the propagated energy generally differs from that of the plane-wave propagation. This makes velocity values to be varied in different directions. Therefore, velocity modeling in such media is completely different from that in an isotropic media. The vel...

Under the light of recent developments of the theory of matter-radiation interaction in the presence of magnetic field applied to non-LTE spectropolarimetry in astrophysics, we have revisited the theory of anisotropic resonance line scattering in moving media by means of the density-matrix formulation. This has led us to present a theoretical method of determination of the matter velocity field...