... The antenna system . ... A military radar system, consisting of two identical radars, was transferred to the Institute of Solar-Terrestrial Physics (ISTP). ... The system features a two-channel transmit-receive antenna. ... By changing the phase difference in the channels, one is able to modify the shape of the total channels' beam in the angle-of-elevation plane. ... The total beam is controlled by introducing the phase signal into the excitation signal of one of the channels. ... Peak power.. ...
The Calendar of Bloody A.tecs. Living in Central Mexico from the XII century to the being of the XVI century warlike A.tecs devoted much time to sciences including astronomy. For needs of agriculture A.tecs, using the knowledge received from the forecomers, developed the exact calendar system. 52 years of the moon-and-the sun cycle formed the basis of it (something like our conception of "a century"). ... A.tecs year was divided into 18 months with 20 days each. ... Mesopotamian astronomy. ...
The Second U.S. Naval Observatory CCD Astrograph Catalog ( UCAC2 ) Table of Contents 1) Introduction 2) Summary of the Project a) Observations and Instrumentation b) Reductions of UCAC Observations c) Computation of Proper Motions 3) Properties of the Catalog and Important Notes For the User a) Sky Coverage b) Completeness c) Positions, Proper Motions and Error Calculations d) UCAC2 Magnitudes e) 2MASS Photometry f) Non-stellar ... All stars in the UCAC2 have proper motions. ...
... Multiexposition 34 images Sun 1/1000 sec f/22 and 1 image background. ... It shows position of the Sun on the sky in the same time of a day during one year. Analemma - a trace of the annual movement of the Sun on the sky - is well known among experts of sun-dials and old Earth's globes as a diagram of change of seasons and an equation of time. ... Previously, the position of the Sun on the sky was calculated with computer as well as optimal moments of time for taking each of the exposures. ...
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Lectures . ... Lecture Series 2014-2015 . ... Clear Sky Chart . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the public. ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...
AAL Guestbook . Please Sign Our Guestbook . ... Previous Page | ... Signed on Thursday, March 17, 2005 at 15:11:05 CET . ... There's a great new astrobiology blog, run by newspaper editor Rob Bignell, at http://alienlifeblog.blogspot.com/. ... Signed on Saturday, December 25, 2004 at 02:46:35 CET . ... auch auf diesen Seiten . ... You have great designs on your site! ... Signed on Wednesday, December 22, 2004 at 17:38:52 CET . ... Signed on Thursday, October 28, 2004 at 19:39:53 CET . ...
Abstract . A self-consistent model for the dynamical and chemical evolution of dense interstellar clouds is examined. The model includes the basic atomic and molecular constituents of dense clouds and the reactions in which they are involved. ... The results of one-dimensional modeling of the early stages of collapse of protostellar clouds of different masses under the action of ultraviolet radiation are presented. Astrophysical applications of the results obtained are discussed. ...
... MASTER Net is 56 square degrees per 1 exposition . ... 06 Dec 2015: GRB 151205B: MASTER-NET early optical observations GCN18665 . ... 18 Nov 2015: GRB 151118A: MASTER-NET optical observations GCN18613 . ... 12 Nov 2015: GRB 151112A: MASTER-NET optical limit GCN18591 . ... 07 Nov 2015: GRB 151107A: MASTER-NET optical observations GCN18565 . ... 31 Oct 2015: Five OTs detected by Global Robotic MASTER Net ATel8232 . ... 02 Oct 2015: GRB 151001B: MASTER-NET early optical observations GCN18380 . ...
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... COMPUTER SIMULATION OF RADIOWAVE MULTIPLE SCATTERING EFFECTS IN IONOSPHERE USING MONTE-CARLO METHOD . ... Distribution of reflected radiation on the ground is computed. ... Such influence can be remarkable if the scattering is multiple, i.e. the optical thickness for the scattering process is considerably greater than a unit. ... Radiation energy transfer in the slab is modeled by distribution of some particles carring small portions of radiation energy. ... The isotropic plasma approximation is...
... В теме В разделе По форуму . ... Научная панорама ? Пятый релиз Слоановского обзора . ... 24.07.2007 [10:04:54] ? данные arxiv:0707.3380 Пятый релиз Слоановского Цифрового обзора неба (The Fifth Data Release of the Sloan Digital Sky Survey) . ... Over the course of five years, SDSS-I imaged more than 8,000 square degrees of the sky in five bandpasses, detecting nearly 200 million celestial objects, and it measured spectra of more than 675,000 galaxies, 90,000 quasars, and 185,000 stars. ...
This domain may be for sale - этот домен возможно продается . ... The gathered information about your visits to this and other websites are used by these third party companies in order to provide advertisements about goods and services of interest to you. ... If you would like more information about this practice and to know your choices about not having this information used by these companies, click here . ...
... Институт прикладной математики им. М.В.Келдыша . БАЛЛИСТИЧЕСКИЙ ЦЕНТР . О Центре . ... История Центра . ... Проект предусматривает перелет КА на гало-орбиту вокруг точки L 2 системы Солнце - Земля с гравитационным маневром у Луны. ... Найдены семейства траекторий перелета на гало-орбиты в рамках окон старта 15 и 30 числа для каждого месяца с марта по июнь 2016 года. ... 15 марта 2016 года . ... 15 апреля 2016 года . ... 15 мая 2016 года . ... 15 июня 2016 года . ...
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Main . ... About meteorites . ... Museum . ... Museum of extraterrestial material . ... The Laboratory has two divisions, the central division at the Vernadsky Institute in Moscow and a cosmochemistry division headed by Dr. V. A. Alekseev in Chernogolovka. ... The Laboratory holds the Russian lunar sample collection, the meteorite collection of the Russian Academy of Sciences, the Vernadsky Institute Museum of Extraterrestrial Material and the meteorite exhibit at the Fersman Mineralogical Museum. ...
... Next Routine] [List of Routines] NAME: ADD_HEADER PURPOSE: addition information from FITS-headers MPFS-frames DESCRIPTION: The function computes the total exposure, mean value zenit distance and modified FITS header CALLING SEQUENCE: Result =ADD_HEADER( headers ) CATEGORY: reduction MPFS-data INPUTS: Headers = String array FITS-headers from the MPFS data OUTPUTS: Header = String array containing the header from the FITS file. ... OPTIONAL INPUT KEYWORD PARAMETERS: BEFORE = Keyword string name. ...