Atmospheric influence on the different radio-engineering system functioning . ESTIMATION OF ATMOSPHERIC OPTICAL CHARACTERISTICS AND REMOTELY SANSED IMAGE CORRECTION . ... Direct transmittance estimation results for 12 channels of the spectrometer CHRIS. ... We have managed to develop a direct method of estimating the discrete Normalized Atmospheric Point Spread Function (NAPSF) from available images alone, not using any external sources of information about the atmosphere. ... IRE RAS 1996-20 11 ...

... The obtained results lead to the following conclusions: a) the heavy element enrichment had taken place in the Galaxy in a few bursts of its activity rether than in a continuons manner; b) these bursts occured during the callapse of the early Galaxy; c) the star formation had been inhibited in the time of the bursts; d) the metal enrichment did not proceed in the periods of star formation, between these bursts of activity. ...

... Cheers, -Mike Data Providers (e.g., data centers, archives) Provider Name: NOAO Collection: High Resolution Atlas of Arcturus Spectra - 0.92-5.36 microns Characteristics: 310 ASCII tables of wavenumber vs flux Storage Format: Text tables Available online: ftp://ftp.noao.edu/catalogs/arcturusatlas/ir Comments: Tables contain three flux values (arcturus spectrum, telluric spectrum and ratio) for both summer and winter observations. ... Linelists also available as text table ...

... to See Comet Hale-Bopp . ... An Online Viewing Guide from . Sky & Telescope . Above: Sky & Telescope 's Dennis di Cicco obtained this view of Comet Hale-Bopp before the start of morning twilight on March 12th at a dark-sky location south of Boston, Massachusetts. ... For more information about Comet Hale-Bopp, including tips on viewing it through a telescope and capturing images with conventional or electronic cameras, please see the March and April 1997 issues of Sky & Telescope magazine. ...

... The Hubble Space Telescope is a collaboration between ESA and NASA. ... In many ways Hubble has revolutionised modern astronomy, by not only being an efficient tool for making new discoveries, but also by driving astronomical research in general. ... However, in the last few microseconds before light arrives at telescope mirrors on Earth it must travel through our turbulent atmosphere and the fine cosmic details become blurred. ... Putting a telescope in space is one way of evading this problem. ...

... Description . Catalog . ... In the Catalog, we publish equatorial (ЮБ 2000 , ЮД 2000 ) and galactic (l,b) coordinates of cluster centers derived as the position of overdensity in 2MASS catalog (Koposov et al. ... Distances, color-excesses and ages are the mean-square values calculated using all available evaluations from different color-magnitude diagrams. ... There are individual pages for every cluster where all available plots and parameters are published. ... 2002). ...

... Meade Instruments Corporation . Telescopes ћ Binoculars ћ Microscopes . ... Frequently Asked Questions: Telescopes and Astronomy . ... If I have questions after the purchase of my Meade telescope, whom should I contact? ... top . ... If I have questions after the purchase of my Meade telescope, who should I contact? ... Although thousands of nebulae and galaxies are directly visible through any Meade telescope, only long-exposure photos show the colors and full extent of these objects. top . ...

Microsymposium 34, MS058, 2001 ANOMALIES OF THE MOON'S THERMAL EMISSION IN THE IR SPECTRAL RANGE (10.5 - 12.5 micron). ... Sternberg State Astronomical Institute, Moscow, 119899, Russia, pugach@sai.msu.ru Summary: New satellite measurements of the lunar-surface radiation temperature were used to construct the spatial angular function of thermal radiation of the Moon in the infrared (10.5-12.5 micron) spectral range. ... These thermal anomalies are observed only in the limited range of phase angles. ...

... SS433 is a close binary system, one star is a supergiant, a second one is a black hole. ... Even a black hole cannot accept such an enormous mass flux, a supercritical accretion disk appears, all the excess gas glows up to several tens of thousands degrees and is ejected off the disk with enormous velocities. ... SAO researchers have found an evidence of the supercritical accretion onto a black hole in SS433, which follows from a brightness variability of the SS433 disk. ...

Электронная библиотека астронома-любителя. ... retrieved from JPL: Mon 04/06/98 09:05 PDT Quick Reference to Mars Global Surveyor Mirror Sites Sites with Fast Update Capability Name MGS Mirror Site Address Bandwidth Update Delay Digital - USA http ://entertainment.digital.com/mars/JPL/mgs300 Mbps 10 Minutes Sun - USA http ://www.sun.com/mars/ mgs 225 Mbps 20 Minutes Silicon Graphics - http ://mars.sgi.com/ mgs 200 Mbps 3 Minutes USA SDSC - USA http ://mars.sdsc.edu/ mgs 155 ...

GENERAL INFORMA T ION ABOUT How does my LOMO® Night Vision Device Work? ... LOMO® NIGHT VISION DEVICES & FAQs When using a Night Vision Device, you are actually looking at an image that is projected by the intensifier tube located inside the unit (Fig. ... Light enters the Night Vision Device through the objective lens and hits the photocathode in front of the intensifier tube. ... Infrared (IR) Illuminator Microchannel Plate (Gen.2 Only) When do I use my LOMO® Night Vision Device? ... Fig. ...

... Comments: 4 pages, 1 figures, appears in "Neutron Stars in Supernova Remnants" (ASP Conference Proceedings), eds P. O. Slane and B. M. Gaensler, 200 . Дается короткий обзор наблюдений остатков сверхновых на спутнике ROSAT. ... astro-ph/0208498 . ... Открытие разрешенного остатка сверхновой в M31 с борта Chandra (The Discovery of a Spatially-Resolved Supernova Remnant in M31 with Chandra) . ... Нейтронные звезды в остатках сверхновых и снаружи (Neutron Stars in Supernova Remnants and Beyond) . ...

STARTEST IMAGES GALLERY . STARTESTING TELESCOPES WITH AN AUTOCOLLIMATOR . ... This website is a joint effort of Markus Ludes from APM-Telescopes and Cor Berrevoets ( Aberrator free startesting Software ). The site aims at explaining the different aspects of star-testing telescopes. ... Markus Ludes (APM telescopes) used a high quality 10" Maksutov Newtonian (Zygo tested at 632,8 nm with the following errors: 1/10.1 wavefront p.t.v. and 1/51 wavefront RMS) as collimator in single pass scheme. ...

... Moon Phase below . ... ARTICLE: Why the moon always shows us the same face . ... Before you continue reading, you should know that this was not always the case, i.e. the Moon once was rotating with respect to the Earth, so that on every night a terrestrial observer (if there was one, because this was long, long before mankind appeared on our planet, and even before any major animals had appeared) saw another face of the Moon. ... Figure 1 (not to scale) shows how we can imagine the system Earth-Moon...

... Using the CFBDSIR wide field survey for brown dwarfs, we identified CFBDSIRJ214947.2-040308.9, a late T dwarf with atypically red J-Ks colour. ... SN 2009ip in NGC 7259 Electronic Telegram No. ... 7.09, [19.0; 2009 Aug. ... Accepted for publication in MNRAS Subjects: High Energy Astrophysical Phenomena (astro-ph.HE) The jet opening angle theta_jet and the bulk Lorentz factor Gamma_0 are crucial parameters for the computation of the energetics of Gamma Ray Bursts (GRBs). ...

... Spherical aberration, coma, and astigmatism are also easily observed using the star test. ... Off-axis images are complex. ... Fig. ... Diffraction by a circular aperture as a function of defocus for no aberration Airy Disk 1 wave defocus Less than 1 wave defocus Fig. ... Diffraction by a circular aperture as a function of defocus for third-order spherical aberration Paraxial Focus Small distance inside paraxial focus Moderate distance from marginal focus Immediate neighborhood of marginal focus Fig...

... The ancient chronical said about the colour rings around the Sun and the Moon, about three suns in the sky, light columns, bright lightning, different "comets" rushing to the Earth, moving among the stars or round the Earth with the sky. All these occurrences may be divided into three categories: one that occur in the near or far space, processes going on in the Earth atmosphere under the influence of cosmic factors and at last the occurrences connected with the Earth atmosphere. ... Rainbow . ...

... The parameter y   characterizes the ratio between the gravitational and magnetic ``properties'' of a star and will, therefore, be called the gravimagnetic parameter . Two magnetic rotators having quite different magnetic fields, subjected to different external conditions but with identical gravimagnetic parameters, have similar magnetospheres, as long as the accretion rate is quite low ( ). ... For isolated rotators, the accretion rate  yr is assumed. ...

... About meteorites . ... Meteoritic data . ... About laboratory . ... The lake is like a round mirror 200 meters in diameter, surrounded by a ring wall 350-400 meters across. ... The ring wall, especially well preserved along the southeast shore of the lake, the steep banks and the great depth, all indicated that at one time there had been a powerful explosion here. ... It is possible that the depth may have been 40 meters before but that the slumping of the banks was helping to decrease the depth. ...

LaserS . ... However to use a laser ray with a view of illumination it is so irrational how to heat a room burnt in a fireplace bank notes. ... Light ray! ... To laser engineering of all a quarter of century, however lasers had already time to win strong positions in many branches of a national economy. ... For example, practically instant punched hole of holes laser radiation many times over augments productivity of operation of the driller and besides essentially raises quality of this operation. ...