CONTENTS #11 (November) 2019
Lunar Navigation and Communication Satellite System Constellation Design for Different Coverage and Service Phases (p. 3 – 19)
S.A. Kaplev, N.O. Kremenetskii, E.I. Ignatovich, A.I. Bolkunov
Ground-based radio facilities are traditionally used for deep space missions’ navigation. However, with the intensification of missions, ground-based navigation facilities will be unable to provide sufficient capacity for increased number of users. Efficiency of communication and navigation at a distance from the Earth and with the shading of celestial bodies will also suffer.
In this regard, space agencies worldwide are conducting research on the development of navigation tools for space missions capable of autonomous operations from the Earth.
However, autonomous on-board equipment currently do not have self-sufficiency, and ground-based facilities in case of the research intensification will not provide the required availability. This leads to the feasibility of multifunctional near-planetary GNSS-like systems development.
The article presents the results of multi-criteria comparison of options for the multifunctional constellation design of lunar navigation and communication satellite system (LNSS) depending on the phase of the Moon exploration. The developed assessment criteria include the maintenance of high navigation availability performance within 10 years, tolerance to failure of the individual satellite and the delta-V minimization for orbital station keeping. As the result, the structure of LNSS constellation is proposed.
This article is the first of a new series of articles devoted to various aspects of the design, development, operation and use of navigation systems in the space service volume, measured from an altitude of 2000 km above the Earth’s surface to lunar transfer trajectory and circumlunar space. The following articles relate, in particular, to halo orbit satellites capabilities and LNSS orbit determination and time synchronization.
Keywords: lunar navigation and communication satellite system; lunar orbital stability zones; frozen orbits design; lunar orbital station keeping.
Radar-Satellite Guidance System for ASM at Ground Targets (p. 20 – 27)
A.N. Detkov, S.Yu. Tregubenkov
The principles of building a radar-satellite system for pointing ASM at ground targets are considered. It is shown that it is expedient to use a compact satellite protractor-interferometer and a pseudodifferential mode of navigation using signals from the GNSS as non-autonomous sensors of the parameters of the rocket’s own motion.
Keywords: ir-to-surface missiles (ASM); ground targets; self-homing; missile trajectory control algorithm; satellite protractor-interferometer; pseudo-differential mode.
The Problem of Identification of Unmanned Aerial Vehicles (UAVS) in a Group Flight in Determining the Trajectory of the Complex Distributed in Space Optical Means (p. 28 – 31)
A.P. Manin, V.V. Vasiliev, R.V. Djugan, D.M. Chelahov, A.I. Fokin
The solution of the problem of identification of UAVS at their group flight is given. The conditions under which the unambiguous determination of the parameters of the trajectory of each UAV from the group isprovided are determined. As criteria of identification are applied the minimum distance between the bearings.
Keywords: theodolite; measurement; unmanned aerial vehicle; angular coordinates; bearing.
Application of Meteorological Radar-Tracking Means for the Estimation of Meteorological Parameters During Dark Time of Days (p. 32 – 37)
В.И. Ковалев, Н.М. Абдикеев, Ю.С. Богачев, С.Ю. Ерошкин
In work prospects of development of hydrometeorological maintenance on the basis of application of meteorological radars for an estimation of optical density of clouds, quantity of balls of overcast and visibility during dark time of days are considered. And as allows to make a continuous estimation of these parameters on area or on a route of performance of aviation works.
Keywords: visibility; dark time of days; meteorological the radar; natural light exposure.
Prerequisites of Making a Wing with Pulsing Flow for Increased of its Bearing Capacity (p. 38 – 42)
V.I. Bogdanov, V.A. Mymrin, А.К. Dormidontov
The possibility of making the aircraft wing with the increased bearing capacity at the expense of pulsing flow is considered.
Keywords: wing with pulsing flow; Boldyrev’s leading-edge vibro-flap; added mass; wing bearing capacity.
Analysis of Moon Rovers Applications for Advanced Research (p. 43 – 49)
Yu.A. Matveev, V.K. Sysoev, A.S. Feofanov
The brief analytical review of moon rovers of both past and future missions is presents. The analysis of various options for moon rovers uses for the creation of various schemes of the Moon research and exploration.
Keywords: Moon; lunar base; spacecraft; landing module; moon rover.
The First Experience of Welding in Space – the Birth of Space Technology.
To the 50th anniversary of the space experiment «Vulcan» (p. 50 – 55)
Thе article is dedicated to the first in the world experiment «Vulcan» in welding in the outer space. The origin and the basic steps is showed, which caused to this breakthrough achievement of national science and engineering.
Keywords: space environment; minigravity; melting; welding; test flight; astronauts.
Era of Mill: Renaissance of Domestic Helicopter Industry.
To the 110th anniversary of the birth of the scientist-designer M.L. Mill (p. 56 – 60)
The main issue of this article is the significance of M.L. Mill for domestic helicopter today. Mill did not just create helicopters, he created the domestic helicopter industry and the scientific school. His main character was the ability to solve problems of strategic importance, determine not only the present, but also the future of helicopter engineering. This is the core mission of the designer general.
Keywords: helicopter industry; design and production of helicopters; general designer.