... Astrometry with the FGS, by contrast, proceeds in the reverse order; the positions of the individual objects are found first, and then a virtual plate is constructed with the help of data from the guide stars and check stars. ... Corrections based on guide star data are referred to as POSITION mode dejittering , and those based on check star data are called drift corrections . ... The adjustments to the astrometry centroids from this POSITION mode dejittering correction are typically about 1 mas. ...

... Display (spectra, total power). ... Using the data archive. ... entering cmds, editing cmd lines, input from files, batch, run. constants, variables,arrays, structures, operators, procedures, functions. programming in idl . ... A user would call arch_gettbl() to input the table (or a subset of it). corfindpat() can create subsets of the table. arch_getdata() or arch_getonoff() can be used to read in the spectra. ... input the data (spectra) for a subset of the archive table: arch_getdata () . ...

Radio Interferometry Principles . Radio Interferometry Signal Processing . ... A radio interferometer consists of a pair of directional antennas that are tuned to receive radio emissions from a source in a desired RF band. ... The antennas are pointed at the radio source of interest and are set up to receive the signal and process it into a form suitable for transmission to the correlator. ... In connected element interferometry, the digital signal goes directly to the correlator. ...

... By default playback only displays the content of the process information. ... showdaltrace respectively.) xmmsas 20050815 1803-6.5.0 XMM-Newton Science Analysis System Page: 2 3.1 Examples In the following we use the data set test.ds created as follows:  dscreatedataset name =' test.ds '  dsaddtable name ='table' rows=10 set =' test.ds  dssetattr to= test.ds % HELLO --type=string --value= hello ccb 1. playback -- sets = test.ds displays: ... Any data set. ...

Next: Recording Systems. Up: Scheduling Tips Previous: Dynamic Scheduling Contents . ... It is not yet possible for the recording process to be totally transparent to the user, but dealing with it is now much less of a burden than it was in the tape era. ... It is required because the overall media supply may not be large enough to allow full time recording at the maximum bit rate and the scheduling committees need to apportion the resources according to the project needs and priorities. ...

... An OBJECT column gives the name of the object observed (usually a star name). ... In critical cases, it is common practice to measure sky on two or more positions around a target object, and these positions must be identified. ... A general treatment of this problem requires a column called OBJECT, bearing the usual name of the object (as in the star tables); a column labelled STARSKY, to distinguish between star+sky, star alone, or sky alone; and additional columns to identify the sky position. ...

Ground Support of RadioAstron . Control and Tracking Stations . RadioAstron satellite control (command transmission, telemetry, orbit measurements) will be conducted from Evpatoria and Bear Lake control stations. ... Coarse orbit measurements will be carried out from control stations. Each measurement takes ten minutes. ... Orbit measurements at tracking stations give only radial component of spacecraft velocity but the measurements are going continuously during observing sessions. ...

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Magnetic field measurements onboard the Interball Tail spacecraft are carried out by the FM-3I instrument which consists of two flux-gate magnetometers covering two different ranges: [-200, +200] nT and [-1000, +1000] nT. Besides scientific goals, the FM-3I experiment data is used to perform the attitude control of the Interball Tail spacecraft. ... August 22, 1995 . ... October 18, 1995 . Top of the page . ... Back to the Interball Home Page . ...

... One of this year's largest mass ejections from the Sun's atmosphere was recorded last Sunday by TESIS telescopes aboard the CORONAS-PHOTON satellite ( video - wmv 4.3 MB ). ... Over the course of a week, two gigantic solar prominences were simultaneously ejected from the surface of the Sun. ... Earth will not feel the Sun's influence either. ... The TESIS observatory ї TESIS: www.tesis.lebedev.ru . ... One of this year's largest mass ejections from the Sun's atmosphere (movie WMV, 4.3 MB) . ...

... Previous: Multi-threaded Query Agent and Engine for a Very Large Astronomical Database . ... Dedicated tools have been developed at CDS in order to face the challenge of fast on-line access to very large astronomical catalogues. ... When a query to such a large catalogue is submitted to VizieR , the CDS database of catalogues and tables (Ochsenbein et al. 2000), a dedicated program handles the request, extracts and decodes the matching data, and sends its output back to VizieR. ... 1990, Russel et...

... Ten thousand years ago, before the dawn of recorded human history, a new light must suddenly have appeared in the night sky and faded after a few weeks. ... Just after the Moon set but before the Sun rose in the early morning hours of August 12, meteors pelted the Earth from the direction of the constellation Perseus, while ions pelted the Earth from the Sun. ... New images of Titan's surface were released last week from the Canada-France Hawaii Telescope featuring the finest details yet resolved. ...

... A comparison of the computed and experimental relations F max ( H), as well as comparison of drift scans of point sources across different horizontal cross-sections of the BP with the corresponding computed cross-sections were made. ... The drift scans of the point source 3С84 (H=87 o ) at the wavelength 7.6 cm across the horizontal cross-sections of the BP (black lines) and the computed horizontal cross-sections of the BP corresponding to them (red lines). ...

Main Sections LabIR main page . ... On January 23, 1998 the space probe NEAR was on its way to its closest approach to Earth. ... However, we were able to record a series of images of the space probe shortly before the sunglint event, and we have assembled them into a movie. At the TIRGO observatory, an observation of the space probe NEAR was organized for the night of January 22-23, 1998. ... We show here a preliminary movie (MPEG format, 412kb) made from 74 frames, each lasting 5 seconds. ...

... Общероссийская неделя "Астрономия на тротуаре" - 15-17 апреля . ... Практическая астрономия ? Астрономия и компьютеры (Модераторы: Deimos , Ed_Vazhorov ) ? Venus transit as seen in NYC (previosly recorded) . ... Ответ #20 : 15.06.2004 [08:40:32] ? ... Цитата: SergeyZ от 15.06.2004 [08:40:32] Братцы! ... Последнее редактирование: 15.06.2004 [13:04:40] от Vladimir Nebotov ? ...

... Главная Астрономия Фотографии Рекорды Форум Гостевая книга . Азбука . ... Обмен кнопками/баннерами в самом . ... Азбука звездного неба / Рекорды и рекордсмены . ... Самая большая планета . Самая маленькая планета . Самая яркая планета . ... Планета с самым большим количеством лун . Самая большая луна . ... Самая большая группа солнечных пятн . ... Самая большая звезда . ... Самая яркая звезда . Звезда с самой большой светимостью . ... Звезда с самым большим собственным движением . ...