... The necessity of simultaneous access to one communication channel by many users, e.g., in satellite communication systems or cellular telephony, has led to the development of the corresponding standards: FDMA (Frequency Division Multiple Access) and TDMA (Frequency Division Multiple Access). ... There is a number of ideas for chaotic signal applications in multiple-access systems, but as a rule, chaotic signals are used there only as efficient and versatile means of quasi-noise signal formation. ...

... INTRODUCTION Some Analysis Centers in Russian Federation such as Information-Analytical centre of positioning, navigation, and timing (IAC PNT) TSNIIMASH, Mission Control Centre (MCC), High-precision ephemeris and time correction estimation system (HETCES/SVOEVP) as well as a number of Analysis Centers of the International GPS Service for Geodynamics (IGS) are producing daily precise orbits and time corrections of GLONASS satellites. ... Calculation of weights of both the Centers and the satellites....

With this knowledge of orbits, we are ready to plan a trip to Mars. ... The spacecraft will already have the 107,000 kilometers per hour (66,500 miles per hour) speed of Earth, whereas Mars moves at only 86,900 kilometers per hour (53,900 miles per hour). ... A speed of about 42,000 kilometers per hour will be enough to escape the Earth's gravity and, when added to the Earth's orbital speed around the Sun, put the spacecraft on a Hohmann transfer orbit to the Red Planet. ... 1,570,000 . ... Earth . ...

I/146 Positions and Proper Motions (Roeser+ 1988) ================================================================================ Catalogue of Positions and Proper Motions Roeser S., Bastian U. =1988A .. ... 449R ================================================================================ ADC_Keywords: Positional data; Proper motions Description: PPM North gives J2000 positions and proper motions of 181,731 stars north of -2.5 degrees declination. ... The mean epoch is near 1931. ...

Chair of solid state physics . ... position in MIPT: . Professor, Head of the Solid State Physics Chair . position in ISSP: . ... scientific degree: . Dr. S. e-mail: . kveder@issp.ac.ru . ... Professor, Deputy Head of the Solid State Physics Chair . ... zverev@issp.ac.ru . ... Secretary of the Solid State Physics Chair . ... povarova@issp.ac.ru . ... dev@issp.ac.ru . ... kulakovs@issp.ac.ru . ... maksimov@issp.ac.ru . ... Professor, Dean of the General and Applied Physics Department . ...

... Bad Astronomy . ... Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... The name "parsec" is indeed a distance of 3.26 light years. ... First off, we need to know about "parallax". ... A great example is easy to show: hold a thumb up in front of your face, about 20 centimeters away. ... That angle is called the parallax angle, and it depends on two things: how far apart your eyes are (the baseline ), and how far away your thumb is. ... 2008 Phil Plait. ...

... POLAM-P . ... HOME . ... ABOUT LOMO . PRODUCTS . MICROSCOPES . ... SURGICAL MICROSCOPES . ... Home Products Microscopes POLAM-P Three Position Interference Slider . ... Three Position Interference Slider with filters of wavelengths 480 nm, 590 nm, and 625 nm. ... LOMO America, Inc. ... 847) 215-8800, Fax: (847) 215-9073 . ... 2000-2016 LOMO America,Inc. ...

... On discrete arithmetical subgroups of complex Lie groups (in Russian), Math.Sbornik, 1968, vol.77, p.542­545. ... The quotient of Picard group in complex ball B (in Russian), Uspekhi Mat.Nauk, 1973, vol.28:2, p.236­237. ... Discrete reflection groups in the complex ball, I (in Russian), Funct. ... Discrete reflection groups in complex ball,II (in Russian), Group the­ ory and homological algebra. ... Cocycles of complex reflection groups (in Russian), Group theory and homological algebra. ...

The Earth. ... The middle raiding of the Earth is 6371,032 km, the pole 6356,777 km equatorial - 6378,160 km. The Earth surface area is 510,2 mln km^2, 70,8% of which is the World ocean. ... According to the modern cosmogonical views the Earth was formed 4,6 - 4,7 billions years ago from the protoplanet cloud captured by the Sun. ... The Earth is conditionally divided into 3 parts: a bark a cloak and a core (in the centre). The external layer - the bark is 35 km thick. ... Above the Earth. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

... TESIS . ... position: Head of the XRAS Laboratory, TESIS Main Designer and Instrument Manager . ... address: LPI, main building, room 177 . ... tel. (499) 132-65-96 . ... address: LPI, main building, room 173 . ... tel. (499) 135-80-81 . ... address: LPI, main building, room 275 . ... address: LPI, main building, room 173a . ... address: LPI, main building, room 174 . ... address: LPI, main building, room 179 . ... address: LPI, main building, room 180a . ... address: LPI, main building, room 178 . ...

... Gallery . ... US 'Echo' Satellite, 1960 . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . ... Title: US 'Echo' Satellite, 1960 . Description: The US 'Echo 1' satellite was an experimental communications satellite - effectively, it was a giant metallised balloon place into orbit. ... US 'Echo' Satellite, 1960 The US 'Echo 1' satellite was an experimental communications satellite - effectively, it was a giant metallised balloon place into orbit. ...

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . You may download the latest source code distribution and install the period search service at your own web server. ...