... 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...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Chirp ionosonde main technical characteristics . ... Linear frequency modulated continuous signals sounding method is relatively simple and has wide application in various special-purpose systems. ... Chirp signals which are applying for ionosphere channel diagnostics usually have10KHz/s -- 1MHz/s. We must point out that under modulation speed increasing there is an increase in noise suppression and resolution power. ...

... учитель информатики и информационных технологий, . ... В последние годы в нашем Центре были проведены эксперименты по использованию офисных информационных технологий для изучения астрономии в 11 классе. ... В проектной работе было решено использовать возможности процессора презентаций Power Point, который превращает введенную текстовую и числовую информацию в профессионально выполненные слайды, наполненные диаграммами, таблицами, графическими иллюстрациями, звуковыми фрагментами. ...

... Because you are a newly created organization, we are not now making a final determination of your foundation status under section 509(a) of the Code. However, we have determined that you can reason-ably be expectqd, to- be a pubricly supported organization described sectiongn in )WCl), t futCl lr[1o U-10 Accordingly, you will be treated as a publicly supported organization, and not as a private foundation, during an advance ruling period. ...

... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

... Structure of Data . ... Catalog . ... In SAI OCL Catalog, we introduce our work on investigation of the Milky Way system of open star clusters. The main goal of our study is a search for new clusters using huge surveys. 168 new clusters have been already discovered by us using J,H,Ks data from 2MASS point source catalog. ... For 141 new clusters, we found their physical parameters using J,H,Ks data from 2MASS catalog and, for a number of clusters, our UBVRI CCD observational magnitudes. ...

. This is my homepage. Unfortunatelly, it's under construction now. I haven't opportunity to prepare my homepage well, 'cause I'm too busy with my work. Some words about me. I'm a student of the 5th course of Moscow Institute of Physics and Technology . The area of my interest is a telecommunications and networks. For any comments send me a mail: ugine@d902.iki.rssi.ru .

. Main Page . Space flight . Crew training . Airshow . Zero Gravity . Hydrospace . Centrifuge . Simulators . Survival . Piloting . Baikonur . Order . Space camp . Space Hotel . "Odyssey" . "Parus" . "Tros" . "Zerkalo" . Photos . On-line Data . We in press . This page is under construction . Projects / Zerkalo: General description . Info: Industry news On-line Data Company ATLAS news Events We in press Contact . Copyright 2000-2016 ATLAS Aerospace . Old version of site .

... mag . ... 127 points . ... mag(J4)-mag(J2) . ... 1012 points . ... mag(J2+J3)-(mag(J1)+(mag(J4))/2 . ... 79 points . 084 Pulkovo . ... 536 points . ... mag(J3+J4) without reference object, quadratic trend is deleted . ... 475 points . ... 26-inch refractor . ... 1124 points . ... 1272 points . ... 395 points . ... 628 points . ... 391 points . ... 777 points . ... 458 points . ... mag(J1+J3)-mag(J2), united with 3E1 . ... mag(j1+j3)-mag(star) . ... 4.6 . ... mag(J1)-(mag(J2)+mag(J3)+mag(J4))/3 . ...

Observing sessions Dippach . We will meet every first Saturday each month. Meeting point will be on the parking in front of the railway station in Dippach-Gare. ... Only under clear skies . ... at: Clubroom 05:30 pm . ... Observation session . ... Meeting point: Dippach-Gare . ... AAL Facebook site . ... O Farol 72,rue Jean Jaures L-3490 Dudelange 05:00 pm . ... Meeting point: Parc Leh Dudelange . ... Meeting point: Dippach-Gare / side Dippach . ... Meeting point: Clubroom Dudelange . ...

... Observing . ... Home Education Workshops at Adorama Astronomy Workshop: Observing Variable Stars from the City ? February 15, 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Presented by€а Adorama €аFor the Amateur Astronomers Association of New York . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... Fifteen years ago, on February 20, 1986 the launching of the Core Block marked the beginning of the Mir Orbital Station construction. Currently the Mir Station consists of 6 modules. ... The Mir Station total mass is near 130 tons. ... For sinking unburned Mir Station fragments after reentering atmosphere a Southern Pacific Ocean area limited by the following point coordinates: 53 њ S, 175 њ W; 23 њ S, 175 њ W; 23 њ S, 132 њ W; 30 њ S, 127 њ W; 30 њ S, 90 њ W; 53 њ S, 90 њ W is choosen. ...

... Астрофорум - астрономический портал ? ... Астрономическое оборудование и аксессуары (Модераторы: zlyden , Denk36 ) ? Бюджетная камера от Point Grey Research . ... 01.12.2008 [20:39:07] ? ... Цитата: S.Fire от 01.12.2008 [21:26:02] Мне эта камера кажется достаточно перспективной. ... Цитировать The Chameleon camera, part number CMLN-13S2M/C-CS (mono/color), is priced at USD $375 (single quantity) and is available now from Point Grey Research and its network of distributors. ...

... Forum . ... Recent Topics . ... MAO main . ... COSPAR Capacity Building Workshop Announcement . ... Над?слано: Понед?лок, 18 Травень 2015 р 11:33:34 . Тема: COSPAR Capacity Building Workshop Announcement . ... A regional COSPAR Capacity Building Workshop on Planetary Missions Data Analysis will be organized immediately prior to the second COSPAR Symposium. ... Further information about COSPAR Capacity Building Workshops is available at cosparhq.cnes.fr/events/cb-workshops . ... MAO NASU . ...

... These Facts and Questions pages mainly tell you how to use the Aberrator-interface and also explain the nature of the aberrations. ... Airy disc: the brightest spot of light when you look at a star in focus. This disc can contain a maximum of 84% of all the light that arrives from a star (perfect refractor telescope). MCT : Maksutov-Cassegrain telescope. A closed-tube mirror-telescope with a secondary obstruction. Less common than the SCT, this telescope uses a corrector (real glass). ...

. Извините, сайт в разработке. Under construction. Email: tungrom@mail.ru

Comment on J2246-1206 . In contrast to the jet pointing to the NE in our image, the 5 GHz VLBI image of Shen et al. (1998) shows no indication of extended emission above the 20 mJy/beam level. Hong et al. (1999) find a jet component to the SE and identify that with a "superluminal" component possibly ejected in 1992. A 15 GHz image from the USNO database, taken nearly at the same epoch as the image of Hong et al. (1999) does not show any component at this position angle. ...

... VaST is a software tool for finding variable objects on a series of astronomical images. ... VaST performs object detection and aperture photometry using SExtractor on each image, cross-matches lists of detected stars, performs magnitude calibration with respect to the first (reference) image and constructs a lightcurve for each object. ... VaST FITS image viewer ./pgfv . ... Part I" PZP, vol. ... K. V. Sokolovsky, S. A. Korotkiy; "New Variable Stars Discovered by the NMW Survey" PZP, vol. ...