... IONOSPHERIC DATA IN THE INTERACTIVE SPIDR SYSTEM . ... The Ionosphere The ionosphere is that part of the upper atmosphere where free electrons occur in sufficient density to have an appreciable influence on the propagation of radio frequency electromagnetic waves. ... These regions may be further divided into several regularly occurring layers, such as F1 or F2. ... E Region: The region between about 95 and 150km above the Earth that marks the height of the regular daytime E layer. ...

... They are an indicator of accuracy of the CCD positional observations for a given observatory. ... Planetary and Space Science 56 (2008) 1847 ­1850 Table 4 The best results of CCD asteroid observations from MPC database for some professional observatories MPC Observatory Code Professionals 673 Telescope 000 :07 0.07 0.08 0.06 000 :06 0.06 0.04 0.05 Year Total asteroids Total positions s a 1849 sd Type USA, table Mountain, D ј 0:61 m, FL ј 9:0 m, FOV ј 22 б ...

Scale-heights of the Galactic disk subsytems with different ages and metallicities . V.Marsakov & Yu. ... It is based on the fact, that all stars cross the disk plane several times during their Galactic orbital period. ... We have used our representative sample of nearby disk F2-G2 stars Marsakov & Shevelev (1995) in which fundamental stellar parameters was determined on the basis of published date on uvby-photometry, proper motion and radial velocities. ... Marsakov V.A., Shevelev Yu.G. Bull. ...

... If you have wished to reach the Special astrophysical observatory the best way is to communicate with Tatyana N.Sokolova: . SAO RAS, Nizhny Arkhyz, . ... A visit to the 6-meter optical telescope BTA, the radiotelescopes RATAN-600 of 600 m in diameter of SAO RAS and the new 32-m dish of the Institute of Applied Astronomy of RAS. ... The visit to SAO, including meals, airflight and local transportation and accommodation, will cost a total of about 220 USD per person. ... 8 USD/per person/per night . ...

... Average effective wavelengths and band widths for various sp ectra Lyrae spectrum f flat k е 1014 Hz 5386 ± 18 4.66 ± 0.04 5714 ± 12 4.1 6234.5 ± 0.5 1.03 5372 ± 18 4.69 ± 0.04 eff 2 Optical Filter ID 1 2 3 4 a Fo c -6 10 erg/cm2 s 12.55 ± 0.10 11.04 ± 0.01 2.77 ± 0.004 12.63 ± 0.10 fo d 6 10 photons/cm2 s 3.40 ± 0.02 3.18 ± 0.004 0.87 ± 0.002 3.42 ± 0.02 Power-law eff f 2 е 5746 ± 317 6197 ± 253 6305 ± 31 5736 ± 316 spectra pl k 1014 Hz 3.70 ± 0.26 3.14 ± 0.16 0.88 ± 0.01 3.70 ± 0.27 Table 1. ...

To see a Russian version of this page, click here . ... Graduated from Moscow State University (MSU), Faculty of Physics in 1976. Ph.D. degree - 1988, MSU. Main field of scientific activities: photometric investigations of various stars, close binary stellar systems and other astronomical objects, including research with use of fast photoelectric photometry with a high time resolution till 1 millisecond. ... New portable photometer . ... Send your mail to: tem@sai.msu.ru ...

. - back to the Virtual Space Museum index. - how to view VRML's, etc... A cool clickable scheme of Mir base module . Mir base module . From Shuttle to Mir . Mir fly-around (VRML) . Mir fly-around (VRML), with Soyuz, Progress and Shuttle . Communication satellite Luch (Altair) . Core module in assembly building . Mir, front view . Right side of Mir . Bottom view . Kristall module . docking mechanism . Luch (Altair) communication satellite . "Space motorcycle" .

Main . ... About meteorites . ... Museum . Khmelevka . Meteorite descriptions . ... Main menu . ... About laboratory . ... Museum of extraterrestial material . Meteorite collection . ... Meteorite encyclopedia . Meteorite web resources . ... Mr. P.L. Dravert searched and searched for the meteorite, and at last his persistence was rewarded. The first, main fragment of the meteorite weighing 5.95 kg was found in a peasant house, on top of a barrel of sauerkraut. ... Dravert wrote: . ...