Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Since the Irkutsk IS radar is based on station "Dnepr", which was not intended for IS measurements, we made a serios effort to modernize this station in order to carry out ionospheric observations. Four main directions of the development of the radar experimental base: . modernization of the radar receiving system; . development of primary processing and measurement control methods; . ...

... Laboratory for atmosphere optics was found in 2000. The main directions of activity of the laboratory . ... The most actual and significant - research of chemical composition of a ground atmospheric slice in conditions of a large industrial center. ... Scientific and industrial optical instrument making. ... Dr. Mikhail G .Sosonkin, senior researcher - head of the laboratory . Yuri S. Ivanov - senior researcher . ... Laboratory for atmosphere optics МАО NANU . ... 380(44)5264539 . ...

... IRAF View . This is the orientation of the image as viewed in an image display via IRAF (e.g. ximtool, saoimage). Note: This is different from the orientation of the image as viewed on a Macintosh, via Remark . ... A +X, +Y instrument offset will move a star in the direction indicated by the arrows. ... Note: The offset direction depends upon which interface the offset command was issued in! ... Note: This is different from the orientation of the image as viewed by IRAF. ...

... 24a.The Rotating Earth . 24b. Rotating Frames . ... That can be interpreted as stating that in the astronaut's frame of reference, all bodies are subject to two forces, gravity and the centrifugal force, and the two are in perfect balance, adding up to zero. ... Viewing the astronaut's motion in the frame of the moving spacecraft, the astronaut is not pulled towards the floor of the cabin or in any other direction, and therefore has the impression that gravity has been eliminated. ...

Circling around magnetic field lines. ... The ring current . Because positive ions and negative electrons drift in opposite directions (see drawing), that motion will create an electric current that circulates clockwise around the Earth when viewed from north. ... How then can the radiation belt and ring current arise? ... Electric fields are able to push trapped particles earthward, and unlike the purely magnetic motion described earlier, an electric field can also energize them. ...

... The QBO period is equal to a linear combination of the frequencies corresponding to the doubled periods: of the tidal year (0.97 year ), of the regression of nodes (18.6 years ), and of the motion of perigee ( 8.85 years ) of the Earth's monthly orbit : 1 2 1 1 1 0.97 18.61 8.85 1 2.3 yr (1) In other words, the quasi-biennial oscillation of the wind direction in the equatorial stratosphere is a combined oscillation ...

... If Earth's sphericity is of prime importance as the ultimate cause of weather and climate, Earth's *ROTATION* is almost as important, although the atmosphere would still exhibit motions even if it wouldn't rotate. ... Take any one of those two conditions away,and these waves become mathematically impossible. ... The Coriolis force is the force directly caused by Earth's rotation, and should be mentioned when going into a more detailed description of the physics of Rossby waves. ...

. Departement of Quantum Astrophysics . Head: Kurt V.G. , Prof. ultraviolet spectroscopy of planetary upper atmospheres and interplanetary/interstellar medium; . observations of gamma-bursts and optical identification of their sources; . long-base optical interferometry. Staff: .

... Aurora over Clouds . ... It is a direction in space that is rich with impressive nebulas. ... Recycling NGC 5291 . ... Following an ancient galaxy-galaxy collision 200 million light-years from Earth, debris from a gas-rich galaxy, NGC 5291, was flung far into intergalactic space. ... Leonids and Friends . ... Leonid meteors rained down on planet Earth this week, the annual shower of dusty debris from the orbit of Comet 55P/Tempel-Tuttle. ... What's the closest active galaxy to planet Earth? ...

... The New Year will start at 00h 00m 01s on 1 January, on your watch, as an extra second will be inserted after 00.00.00 to compensate for the Earth's slowing rotation period! ... The gravitational pull of the Moon (ignore the Sun for this purpose) draws the Earth's oceans out in two opposite bulges - one towards the Moon where the pull is strongest, and one on the other side of the Earth, where the Moon's pull is weakest. ... Happy New Year to all, Terry Moseley . Last Revised: 2006 January 3rd . ...

Instrument Science Report OSG-CAL-97-06 Velocity Aberration Correction for Parallel Observations Colin Cox October 22, 1997 ABSTRACT The velocity aberration correction performed by the HST pointing control software is valid for the target direction only. ... For directions within 500 arcsec of the target the variation of the correction difference does not exceed 24 milli-arcsec. ... As HST orbits about the earth, the barycentric velocity and hence the velocity aberration correction varies. ...

... 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) . ...

... 2001 April 25 . Space Laser Creates Artificial Star . ... So rather than try to eradicate existing stars with a laser, these astronomers create an artificial star of their own right where they need it -- with a laser . Subsequent observations of the artificial laser guide star can reveal information so detailed about the blurring effects of the Earth's atmosphere that much of this blurring can be removed by rapidly flexing the mirror. ... About APOD | ...

... The changes are important to us, since they affect our time reckoning, our climate, and our understanding of the Earth's past. ... The Invariable Plane . ... The current location of the celestial north pole, the ecliptic north pole, and the north pole of the invariable plane in the northern sky. ... The north pole of the invariable plane lies in Draco, its south pole in Mensa. ... The precession of the celestial north pole, viewed from above the north pole and against the background of northern...

Next: Retrieving demonstration and Up: Introduction Previous: Introduction . As described in Chapter , the reduction of long slit spectra comprises three main steps: . ... correction for distortions perpendicular to the dispersion direction ( e.g. , due to differential refraction in the earth's atmosphere) . ... First-time users may find it useful to follow it as it stands, step by step, in order to become acquainted with the plain technical operation of the available commands. ...

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... 2/3-m Telescope . ... Irvin M. Winer . ... Science . ... Tom Kaye, an amateur astronomer from the Chicago, Illinois area, installed his Tau Boo campaign equipment at our facility in mid-February, 2000. ... The custom unit fed the starlight to an optical fiber that transmits the light to a bench spectrograph located in the Winer machine shop. ... The daily results from mid-February, 2000 to early March, 2000 are shown on the left. ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

... The Raw Images . Table 1: List of Viking Orbiter Images of the "Face on Mars" . ... Processing the Face Images . ... In July, 1976, Viking Orbiter 1 was acquiring images of the Cydonia region of Mars as part of the search for potential landing sites for Viking Lander 2. ... Using the height field, it is also possible to view the "Face" from different look directions, by mapping the Viking Orbiter image directly on the the topography and then placing the "viewer" at different locations. ... Mars . ...

... The Figure shows the parallactic angle in relation to the source position at (RA,DEC), the zenith of the telescope at (LST,AoLatitude), the hour Angle HA, and the azimuth direction AZ (in the picture the source has already transitted). ... Now suppose that a second feed was placed 1 beam width away from the central horn parallel to the azimuth arm. ... Figure 1. shows the parallactic angle rate versus azimuth angle for declinations 8 through 28 (spaced 1 degree steps from Arecibo's latitude). ...

... Milky Way . ... Map of the Milky Way (based on data from NASA's Spitzer Space Telescope) showing its two major stellar arms and central bar. ... ТљIn written science fiction, one often encounters another navigational convention, where towards the Galactic Centre is described as т??Corewardт??, away from the Centre towards the rim of the Milky Way is т??Rimwardт??, objects in the direction of the Galaxyт??s rotation are т??Spinwardт??, while objects in the opposite direction are т??antispinwardт?? ...