ati – گروه ها

Processing Three-Channel SAR-ATI for GMTI

This paper investigates two methods for GMTI using three-channel SAR-ATI data. Motivated by previous results in the two-channel case, a deterministic method for finding an Eigendecomposition of the SAR-ATI sample covariance matrix is presented. The CFAR detection capability of each of the eight parameters of the Eigendecomposition is evaluated using measured three-channel airborne data and comp...

Effective ATI channels in high harmonic generation

Harmonic generation by an atom in a laser field is described by the three-step mechanism as proceeding via above-threshold ionization (ATI) followed by the electron propagation in the laser-dressed continuum and the subsequent laser assisted recombination (LAR). An amplitude of harmonic production is given by the coherent sum of contributions from different intermediate ATI channels labeled by ...

Sea Surface Speed from Terrasar-x Ati Data

The paper presents a methods to retrieve the speed of the sea surface from Along Track Interferometry (ATI) data beside the typical use for target speed retrieval, which is also mentioned. The describe technique provides for a data prefiltering in order to obtain the necessary accuracy because of the law speed range of the currents. Furthermore, an example of target velocity estimation is provi...

0 Atomic Antenna Mechanism in Hhg and Ati

Evidence for resonant effects in high-order ATI spectra

We have observed resonant phenomena in the intense-field ionization of argon that do not easily fit into the standard models of above-threshold ionization. High-resolution angleresolved measurements of the energy region around 6–10 times the ponderomotive potential UP in the ATI electron spectrum show at least three separate series of peaks, each with a distinct intensity threshold for their on...

EVALU ATI ON OF THE CAUSES OF CHOLESTASIS IN INFANTS

During a period of three years from 1996 to 1998, 124 infants (64 male and 60 female) with an age range of 1-6 months (mean age 1.5 months) with cholestasis were studied. Idiopathic neonatal hepatitis was the most common cause of cholestasis, accounting for 48 cases with a rate of 3'8.70% in a total of 124 patients, followed by galactosemia in 29 patients (23.38%) and extrahepatic biliary ...