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. " The Arecibo Observatory is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations . expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Science Foundation."

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• byu phased array feed.
• The AO Optical Laboratories National Astronomy and Ionosphere Center (Arecibo
• Arthurn Neil National Astronomy and Ionosphere Center (Arecibo Observatory)

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... PUL VLBI Analysis Center . ... Pulkovo EOP and Reference Systems Analysis Center (PERSAC) is located at the Pulkovo Observatory . ... Processing of VLBI , GPS, and optical observations aimed at analysis of the Earth rotation, station displacement, and celestial reference system. ... Celestial Pole Offset (CPO) and Free Core Nutation (FCN) . Four daily updated CPO and FCN series (models) are provided. ... File fcn1.dat contains the ZM1 FCN model with variable amplitude and phase. ...

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• Pulkovo VLBI Analysis Center

Next: Catalog Construction Up: Observations and Analysis Previous: Source Detections . ... It was assumed that the highest signal gives the most likely position of the source. ... Comparing the summed map with the maps from the individual energy ranges, the one which produced the smallest error box was chosen to represent the source position, as long as was greater than 4, a level chosen to reflect a reasonable degree of confidence in the detection. ...

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• Cosmology FAQ: Where is center of the Big Bang?
• Catalog of Galaxies behind the Milky Way
• Spectral Analysis

Optical Filters . The WFPC2 camera configuration and filter set require a substantial number of apertures for full utilization of its capabilities. ... An additional set of aperture names have been defined for use with the WFPC2 filters which require partial rotations. ... The pixel coordinates of these apertures will be reviewed on a regular basis to reflect changes in CCD and filter cosmetics. ... The aperture name is generally the same as the (rotated) filter name. ...

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• STIS Instrument Handbook
• Offset between CCD and MAMA Coordinate Systems

... CfA Home . HCO Home . SAO Home . ... Welcome to CfA . CfA History . ... Laboratory Astrophysics . Extreme Astrophysics . ... 617) 495-7210 . ... 617) 495-7044 . ... 617) 495-7265 . ... HEA Research . ... HEA Home Page . CFA/HEA Home Page . ... High Energy Astrophysics Division (HEAD) . Chandra X-ray Center . ... Chandra Cluster Cosmology Project . Chandra Multiwavelength Project (ChaMP) . ... Chandra-Planck Clusters Project . ... CfA Virtual Observatory Project . ...

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• SAO RSDC Home Page - RRA - PSPC
• The AstroStat Slog science center
• A box, to include extended emission

... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...

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• The AXAF Ground Aspect Determination System Pipeline
• Hubble Space Telescope Telemetry Access using the Vision 2000 Control Center
• Modern CCD Observations of Moving Celestial Objects: Algorithms and Software

... НЕПРЕРЫВНОГО МАТЕМАТИЧЕСКОГО ОБРАЗОВАНИЯ . ... Кружок ?Олимпиады и математика? ... Московская математическая олимпиада . Заочный математический конкурс . ... Устные математические олимпиады . Олимпиады по программированию . Математический праздник . Математические регаты . ... Математические бои . Олимпиада по геометрии им. И.Ф.Шарыгина . ... Программа ?Math in Moscow? Научные конкурсы . Творческий конкурс . ... График олимпиад . ... XXVII Математический праздник . ...

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• Moscow Center for Continuous Mathematical Education - Independent University of

Results of analysis . ... IAA EOP Service . ... EOP series are regularly submitted to the IERS, and also are available at the IAA EOP Service page. EPN coordinate time series . EUREF Permanent GPS Network (EPN) coordinate time series is computed from analysis of available EUREF weekly solutions. ... Second solution is based on independent combination of individual EPN Analysis Centers' solutions . ... USNO GPS Timing Operations . ... GPS Time Series . ... EPN : European Permanent GPS Network . ...

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• IAA VLBI Analysis Center
• (Untitled)
• IAA EOP Service

This Home page will support the INTERBALL mission coordinations with other simultaneous Space Physics missions during TAIL 1996/1997 campaign (October 1996 - Janury 1997). IKI Situation Center will provide the situation analysis in order to predict the Favorable Spatial Positions (FSP) and multisatellite magnetic conjugations for spacecraft as follows: IB_AURORAL, IB_TAIL, POLAR (NASA), GEOTAIL (NASA/ISAS). ... Auroral probe POLAR . Auroral probe GEOTAIL . Tail probe POLAR . ...

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• IKI SSC
• The magnetosphere models

... Институт прикладной математики им. М.В.Келдыша . БАЛЛИСТИЧЕСКИЙ ЦЕНТР . О Центре . ... Баллистический Центр Института прикладной математики им. М.В.Келдыша РАН . Баллистический центр (БЦ) ИПМ им. М.В. Келдыша создан по предложению С.П. Королева и М.В. Келдыша в 1965 году. На него были возложены работы по баллистико-навигационному обеспечению (БНО) управления полетом пилотируемых кораблей и автоматических космических аппаратов научного и народно-хозяйственного назначения. ...

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... Tonight's Sky . ... Sky this Month . ... The Sky This Week: April 1 - 10 . ... Sky this Week . ... Astronomy for Kids . ... Sky Events . Get to Know the Night Sky . Tour the Deep Sky . Sky Guide . ... Observing springtime deep-sky objects with a large telescope . ... Astronomy 101 . ... Astronomy Day . ... Gift Center . ... NASA's Ames Research Center in Moffett Field, California . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

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• International Center for Radio Astronomy Research, Perth, Western Australia |
• Marshall Space Flight Center, Huntsville, Alabama | Astronomy.com
• NASA's Goddard Space Flight Center, Greenbelt, Maryland | Astronomy.com

... Observations . ... Natural Satellites Data Center. ... Nomenclature of satellites | ... Inner satellites of Jupiter . ... Inner satellites . Mutual events of the Galileans . ... Inner satellites of Saturn . Main satellites of Saturn . ... Mutual events of the main satellites . Inner satellites of Uranus . Main satellites of Uranus . ... Mutual events of the Uranian satellites . Inner satellites of Neptune . Main satellites of Neptune . Outer satellites of Neptune . ...

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• Description of Data
• Links to Sites Related to Solar Physics
• Natural Satellites Data Center. Objectiv.

... Time calculated from Fermi GBM Trigger Time = 14:12:08.67 ( Connaughton, GCN 9230 ). 1% coincident with our start zero image time. 3x3 degrees around Swift XRT position . ... SUBJECT: GRB 090424 : MASTER-Net prompt optical limit DATE: 09/04/25 20:29:42 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski ... Our observations results: ---------------------------------------------------------------------- Fermi GRB Trigg.* ...

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• MASTER GRB101123A prompt observations

Peremennye Zvezdy", . ... Star Name: . ... During observations of a field in Perseus, we discovered a transient event. ... A total of 5 images with 5-minute exposures were obtained on JD 2455538. ... The combined image is shown under the light curve (top right panel). ... At the transient's position, an extremely faint star-like image is visible, marked as "Var"; its magnitude is approximately 13 m . ... Light Curve . The light curve of the transient and four images of the region around it. ...

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• Sgr A*: Fast Stars Near the Galactic Center
• Sgr A: Fast Stars Near the Galactic Center
• Астронет > Sgr A*: Fast Stars Near the Galactic Center

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Antenna system . ... The Irkutsk incoherent scatter radar is one of the world's nine active radars which give the opportunity to investigate ionosphere by the incoherent scatter method. ... Antenna gain coefficient . ... Antenna . ... Two antennas . ... To get an idea what station "Dnepr" antenna system looks like, let us consider some of the radar views which are given by the photographs General view and Side view . ...

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• East Siberian Center for the Earth's Ionosphere Research. SW radiosignal
• East Siberian Center for the Earth's Ionosphere Research. Modernization...
• East Siberian Center for the Earth's Ionosphere Research. Modelling, secondary

Masers and Galactic Structure: µas Astrometry with the VLBA Mark Reid Harvard-Smithsonian CfA Andreas Brunthaler & Karl Menten Germany Xu Ye & Zheng Xing-Wu China Lincoln Greenhill CfA Luca Moscadelli Italy Talk Outline · · Locating Sgr A*(IR) with masers Proper motion of Sgr A*: Sgr A* is very massive measured value for 0/R0 Star Formation Parallaxes and Proper Motions: Locations of Spiral Arms Rotation Curve (dark matter) Spiral Density Wave Theory · Where is the Galactic Center? ... Plane! ...

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• Source Fitting and Positions
• Archive of VLBI Observations Majordomo List
• The GIPSY Recipes Book

... The ODFs are generated with scisim-2.1. 1.1 scisimsimple This test ODF contains one X-ray source (1 keV, broadened with a 20 eV Gaussian), and several optical sources. The ODF was generated using the default con guration modes for all of the XMM instruments as provided by SciSim. 1.2 scisimquad This test ODF is an observation of four point sources with an incident angle of 0.05 degrees and positioned in a square. ... All instruments are in the default con guration mode as provided by SciSim. ...

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• http://xmm.vilspa.esa.es/sas/7.1.0/doc/testodf.ps.gz
• http://xmm.vilspa.esa.es/sas/6.1.0/doc/testodf.ps.gz
• http://xmm.vilspa.esa.es/sas/6.5.0/doc/testodf.ps.gz

... School students recover Martian companion using Faulkes Telescope . ... We therefore decided to calculate positions 2 arc minutes and 6 arc minutes on either side of the predicted position to point the telescope, with the field of view being 4.7 arc minutes. ... Line of variation search (+ marks predicted position, O marks actual position) - Images obtained using the Faulkes Telescope North, operated by Las Cumbres Observatory . ... These observations were also sent to the Minor Planet Center. ...

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• Observations with the Faulkes Telescopes
• Armagh Observatory
• Observations and Data Reduction