TOOLS OF TEST GENERATION FOR SATELLITES CONTROL PROGRAMS Andrey Tyugashev, Ekaterina Myasnikova, Elena Sopchenko S.P. Korolyov Samara State Aerospace University (National Reseach University) The paper presents a research in the field of test automation for testing spacecraft control programs. ... Programmers or designers of spacecraft systems write tests manually. ... Tests are carried out by issuing the control actions on the spacecraft and condition monitoring systems parameters of the spacecraft. ...

... 8, ``Celestial Mechanics'', 2002 High precision parallel algorithms of numerical integration of celestial mechanics problems N. V. Batkhina, A. B. Batkhin Volzhsky Institute of Humanities, Volgograd State University, Volzhsky, Russia We investigate different scenarios of dynamical chaos origin in Hamiltonian systems generated by some celestial mechanics problems. ... 22 We compiled these algorithms to C programming language with free multiple precision library GMP (GNU MP library) [5]. ...

... sfit . ... commands . scl . ... Define parameters for controlling performance of genetic algorithm . ... generations . The maximum number of generations the program will go through, before stopping, if the solution is not within the given tolerance. 10 . ... The number of parents randomly generated in the first generation, and in each subsequent generation. 50 . ... This is multiplied by the number of parameters being varied to give the total string length for each parent. 16 . ... elitism . ...

... Expected NICMOS Performance after HST Servicing Mission 3 . NICMOS Cooling System Design . ... NASA is developing the NICMOS Cooling System (NCS) to provide operation of NICMOS beyond the exhaustion of its stored solid nitrogen cryogen. ... The NCS combines an external radiator identical in design to the ACS/STIS Aft Shroud Cooling System (ASCS) planned for SM3, a Creare, Inc. reverse-Brayton cycle turbine cooler, and an EVA installed neon loop to the NICMOS dewar's cooling coil. ...

. You can compare any two versions of a file that is under the control of SCCS with the sccsdiff command: /usr/sccs/sccsdiff -r version -r version s. filename . Using this command produces a line by line difference between the two versions of the file. Results are shown in the same format as that produced by the diff command. Examples .

... The sample of the Local Volume galaxies (distance smaller than 10 Mpc) gives a unique opportunity to study the properties of galaxies including the weakest objects: the absolute magnitude M B -10 and the virial mass M vir 10 9 M x263C;. ... Luminosity function of the Local Volume galaxies. ... The luminosity functions for galaxies are presented: red dashed line - from the 2dFGRS survey (Norberg et al. 2002); blue dash-dotted line - from the SDSS survey (Blanton et al. ...

... Mass . 17a. Measuring Mass . ... A medium-size (1.25 inch wide) binder clip, as is used in offices to hold papers together--the type made of flat blue steel, with two wire handles. ... The theory predicts that the oscillation period should be proportional to the square root of the oscillating mass, including the mass of the clip. Note that gravity plays no part here: the oscillation period would be the same on the Moon or in zero-g. Denoting square root by SQRT, we have . ...

M. D. Neusel Texas Tech University Lubbock, United States mara.d.neusel@ttu.edu Degree b ounds, the regular representation, and invariants of p ermutation groups in general Let F be a field, G a finite group, and consider a faithful representation of G : G GL(n, F) of degree n over F. Via the group G acts on the vector space V = Fn , hence on the dual space V , and thus on the symmetric algebra on the dual, denoted by F[V ]. ... Let : G GL(n, F) be an arbitrary nonmodular representation. ...

Introduction The suggested invention relates to attitude control system of a spacecraft. ... Systems without interaction with ambient (Systems with jet engines) Here, for instance, we can put systems, which can generate torque because of jettisoning any particles or gas. ... The main element of the suggested attitude control system is an electrical motor, which main feature is absents of a stator. ... 3 Block diagram of an attitude control system on a jet engines base. ... It is a system with| | ...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . Directory of astronomy web sites. ... Listed Since October 25, 2004 . ... Web Site . http://123world.com/astronomy/index.html . ... Web . www.astronomy.net . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

GRANAT is the Russian x-ray sattelite launched to the high apogee orbit (200,000 km) and operated almost for 10 years (1989 -1999) , carrying out four major instruments: French SIGMA coded-mask hard x-ray telescope (30-1000 keV), Soviet ART-P coded-mask telescope (2??-60?? keV), all-sky monitor WATCH (6-150 keV), and a gamma-burst detector PHEBUS . ... Since September 1994, GRANAT is in the survey mode. ... Explore pages devoted to individual GRANAT instruments (including main scientific results): . ...

... several mechanisms of sound generation by electromagnetic waves, all specific for low temperatures, were disclosed and studied (V.F.Gantmakher and V.T.Dolgopolov; see Sov.Phys.-JETP 30, 78 (1970); . ... it was demonstrated that quantum oscillations of conductivity in bismuth had smaller period near the crystal surface that in the bulk (S.S.Murzin and V.T.Dolgopolov, JETP Lett. 37, 696 (1983); . ... JETP 74, 905 (1992); 76, 714 (1993); 77, 513 (1993); 78, 226 (1994); 82, 951 (1996); JETP Lett. ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Meade's revolutionary LS LightSwitchтДв series of telescopes use advanced technologies to do what no other consumer telescopes have done before: take all the hassle out of using a telescope. ... Remote Sensors . ... TS34C-M Wireless long range remote temperature sensor . ... Wireless long range remote temperature sensor #TS34C-M. Reads outdoor temperature in degrees Fahrenheit as well as humidity and transmits up to 328 feet (100 meters). ...

... At The Core Of M15 . ... 17.01.1998 . ... Credit: P. Guhathakurta (UCO/Lick, UC Santa Cruz) , NASA Explanation: Densely packed stars in the core of the globular cluster M15 are shown in this Hubble Space Telescope (HST) image. ... M15 has long been recognized as one of the densest clusters of stars in our galaxy outside of the galactic center itself. ... Publications with keywords: M15 - globular cluster . Publications with words: M15 - globular cluster . ... Globular Star Cluster M3 . ...

Next: Navigation Pre-Observation Products . ... SRT (Space Radio Telescope) Schedule (SRS) File . ... What: GOCG generates the Space Radio Telescope (SRT) schedule file, or SRS file, from current GSTS file. The SRS file has more precise time stamps than long-term schedules, and also designates which GTS will be used when. ... The SRS file also serves as the antenna pointing schedule file, as it describes the planned orientation of the spacecraft (and solar panels) as a function of time. ...

Experimental rocket R-1A . To mature mass and operating characteristics of rocket R-1, its designers proposed to use an integral fuel tank and a warhead separated from the rocket at the ascent phase completion. In this case, only the ascent phase appeared to be rated for the launch vehicle and considerably more favorable regarding mechanical and thermal loads as compared to the atmospheric portion of the descent phase of the flight trajectory. ... Official WEB-site of S.P.Korolev RSC Energia . ...

Heavy elements such as the uranium used in generating nuclear power are extremely concentrated sources of energy. ... Space rockets require not just energy, but also mass , matter ejected backwards, of which nuclear fuel provides very little. The limiting factor in the operation of rockets is not a shortage of energy but the high temperature at which they operate. ... One possible loophole remains. ... Test model of "Orion," pro- . ... Next Stop: #32 Far-out Pathways to Space: Solar Sails . ...

The Very Large Telescope Interferometer (VLTI) at ESO s Paranal Observatory in Chile has obtained the sharpest view ever of the dusty disk around the close pair of aging stars IRAS 08544-4431. For the first time, such disks can be compared to the disks around young stars and they look surprisingly similar. ... The inset shows the VLTI reconstructed image, with the brighter central star removed. The background view shows the surroundings of this star in the constellation Vela the Sails. ...

S AO's New Generation Multipurpose CCD Controller . ... In the 1990?s considerable advances have been made in the world over technology of manufacturing scientific image detectors with high photoelectric characteristics, which called for the creation of new complex array controllers to operate such detectors. ... very low readout noise; . ... Quite a few teams of researchers and engineers are ingaged in the development of controllers. ... development, SPICE modelling and design of modules; . ...

... 400mm f/2.8 Nikor lens: images the sky on the entrance slit. ... The optical system maintains image quality along the slit length so that each row of the image is a spectrum of that spatially selected region of the sky. 180mm f/2.8 Nikor lens: collimates the light from the slit. ... The auxiliary optical platform on WISPI now accomodates a short focal lens and a guiding/imaging video system that may use sub-pixel corrections to provide feedback to the tracking drive motors. ...