High energy hadrons in EAS at mountain altitude

An extensive simulation has been carried out to estimate the physical interpretation of dynamical factors such as , in terms of high energy interaction features, concentrated in the present analysis on the average transverse momentum. It appears that the large enhancement observed for versus primary energy, suggesting in earliest analysis a significant rise of with energy, is only the result of the limited resolution of the detectors and remains in agreement with a wide range of models used in simulations.Comment: 13 pages, 6 PostScript figures, LaTeX Subm. to JPhys

Investigation of sensitivity of the suboptimal algorithm for target’s coordinate estimation to variations of parameters of the received radar signals

The paper describes a modified technique of sensitivity analysis of quasilinear algorithms for estimating targets’ coordinates with regard for the first terms in expansion describing the models of observation-message. An example is included illustrating the sensitivity analysis of the suboptimal algorithm of filtering

Joint probability densities of envelopes and phases in signal-noise mixture in the reception channel of a surveillance monopulse radar system

To check the hypothesis about independence of probability densities (PD) of envelopes and phases in the mixture of a determinate harmonic signal and quasiharmonic noise in the summation (Σ) and difference (Δ) channel of the reception part of the surveillance monopulse radar, expressions are derived for joint PD of these values in the form of products of single-dimensional PD in the Σ- and Δ-channels