... With the ATCA beam at 3mm being comparatively small ( ), it is possible for tracking errors to be significant. ... In additional poor tuning of the antenna drive systems can sometimes cause poor tracking, particiularly soon after a change in source. ... Tracking errors are caused by flaws in the drive servo system, whereas pointing errors are a sum of tracking errors and errors in the antenna pointing model. ... The task uvflag can be used to flag based upon rms tracking error. ...

... A strong nonlinearity of the detector response was analyzed on the basis of a diffusion model taking into account the quasiparticle self-recombination and edge losses. r 2006 Elsevier B.V. All rights reserved. ... The main reason of line broadening is the spatial dependence of the detector signal on the photon absorption site. ... The recombination and edge losses induce the signal reduction for photon absorption points in edge regions and cause line broadening. ...

. Language [RU/EN] Search: . Home . UP . Research . Projects . Services . Info . News . Events . Personal . Archive . Ionosphere and radiowave propagation: structure . The main page . Information . Publications: . 2011 - 2015 . 2009 - 2010 . 2007 - 2008 . 2005 - 2006 . 2000 - 2004 . 1995 - 1999 . Participation in International symposiums and conferences: . 2013 - 2015 . 2011 - 2012 . 2009 - 2010 . 2007 - 2008 . 2005 - 2006 . 2002 - 2004 . N.V. Pushkov . 09/04/2016 23:52 MSK . webmaster@izmiran.ru .

Telescope Jumps: One Cause is Found . ... One tries to take out the sag of the secondary cage as the telescope is pointed toward the zenith. The second component tries to take out changes in the secondary piston caused by temperature changes of the truss structure. ... Second, the jumps only occur when the temperature data causes motions of the piston which go in a direction opposite to the direction in which the sag component is driving the secondary. ... One has to wonder how this can occur. ...

... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... What would cause Earthт??s orbit to become more circular instead of its present elliptical orbit, and has this ever happened before? ... Gravitational interactions among the planets cause the ellipticities of the orbits to oscillate periodically by a few percent over millions of years. Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

... Discussion of Declination Drive Design . ... It is held in my personal stock of parts to replace a drive that might go out of service for some reason on one of the two LX200 telescopes that I am responsible for keeping in good repair.  ... The photocells detect light from a pair of small lights through the encoder mask and encoder wheel encased in the gear box housing. ... In one case of declination drive runaway, the cause was breaking of one of the leads to one of the photocells.  ... All fixed!! ...

... Submitted by Robert Halstead on 10/12/2010 20:35:42 . Stacked image to get longer exposure . This image was created by stacking nine 60-second exposures that were made over the course of a 30-minute period. The comet is moving through the sky quickly enough that aligning the comet in all the images causes the star images to spread out in a line. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

... Удобные брюки для мальчика Sela идеально подойдут вашему ребенку для отдыха и прогулок. ... Прямые брюки на талии имеют широкую эластичную резинку, регулируемую шнурком, благодаря чему, они не сдавливают живот ребенка и не сползают. ... Такие брюки станут модным и стильным предметом детского гардероба. Цвет: разноцветный . Коллекция: Весна-лето 2016 . ... Олимпийка Blue Fashion. Цвет: мультиколор. Сезон: Весна-лето 2016. ... Цвет: черный . Коллекция: Осень-зима 2015/2016 . ...

Using 3X3 Binned Mode for MOS Cameras for Fast(er) Imaging Tony Abbey, Leicester University XMM Calibration/Ops Meeting Mallorca 26-27 October 2006 1 Introduction · Started discussion of use of MOS for slew survey in May · Full frame mode of 2.7s per frame causes too wide a PSF · The original MOS modes included a 3X3 binned mode for fast diagnostics. ...

Home About Meade Product Information Dealer Locator Customer Support Investor Relations Dealer Support Employment Opportunities Site Map . Meade Instruments Corporation . ... Meade Pictor XT-Series CCD Autoguider/Imagers . ... Be sure the baud rate is not set too high for your pc; check your user's manual if you are not sure. ... No SCSI Communications . ... Be sure that the SCSI id is set correctly for your camera. ... Copyright 2006 Meade Instruments Corporation, All Rights Reserved. ...

Note: you can click on a picture to see it enlarged ...you float into the ODS (Orbite Docking System) from Shuttle's airlock through tunnel extension ( also serves as EVA airlock ). The tunnel leads further to the Shuttle's back where Spacelab is placed. ... You move upwards.....and see a closed hatch. It's time to open it! Yet another closed hatch - but it's not the Shuttle's, it belongs to the Russian space station Mir. Open it - and you are in the Mir's docking module . ...

NASA JOHNSON SPACE CENTER ORAL HISTORY PROJECT BIOGRAPHICAL DATA SHEET NAME: Charles Joseph Donlan O RAL H ISTORY: 27 April 1998 EDUCATION: BS in Aeronautical Engineering, Massachusetts Institute of Technology, 1938 PRE- NASA CAREER: Langley Aeronautical Research Center , Virginia Stability Analysis Group (date unknown-1941) Assistant Head of the Stability Tunnel (1941-1944) Project Engineer, High ... Review of Langley Research Effort" to Langley Aeronautical Laboratory Director. ...

... Airplanes are held up by the way air pressure rearranges itself when air flows over the wing of an airplane. ... With the airplane in flight, an air flow passes over the wing, and the shape of the wing's cross section--curved above, flat or nearly flat below--reduces the pressure on top, causing the extra pressure from below to exert a lifting force (" lift "). ... Then at cruising altitude, as the airplane speeds up, the wing is rotated around its pivot--one tip points forward, one back. ...

... The statements break and continue are used for this. The break command terminates the execution of the innermost enclosing loop, causing execution to resume after the nearest done statement. ... The continue command causes execution to resume at the while , until or for statement which begins the loop containing the continue command. You can also specify an argument n|FR to continue which will cause execution to continue at the n|FR th enclosing loop up. ...

... Next: MEM Task for Up: Image Restoration and Previous: RegisteringPSF-Matching and . ... In gyro-hold tracking mode, HST is stabilized only with its gyros, and the Fine Guidance Sensors are not used to maintain pointing. ... Experiments have been done on WFPC 2 images of NGC 330 and NGC 422 (having exposure times of 80 and 100 s in gyro-hold mode) with complete success. ... An NGC 422 WFPC 2 WC2 image and an NGC 330 WFPC 2 PC1 image were taken in mode FSGLOCK = GYROS in 1994 January. ...

Main . ... About meteorites . ... Press about meteorites . Meteorite Press . ... Meteor poltergeist . Main menu . ... About laboratory . ... LESOTHO. An outbreak of ghost activity that struck Lesotho last year has been found to have been the result of a spectacular meteor shower. ... Now the cause of the mystery rocks has been found to have been a meteorite. ... The Thuathe meteorite, as it has been christened, has ensured that Lesotho will now have a place in the science of meteoritics. ...

Next: E-P transitions for different Up: Evolution of Magnetic Rotators Previous: Mixing types of E-P-A . As mentioned earlier, the transition of the rotator from the ejector state to the propeller state is not symmetrical. ... One can see that in the case of a fast rotator, an interval of appears where three different values of are possible, the upper value corresponding to the ejector state and the bottom value to the propeller state; the intermediate value is unstable. ...

... Range Widgets . ... All of the GTK range widgets react to mouse clicks in more or less the same way. Clicking button-1 in the trough will cause its adjustment's page_increment to be added or subtracted from its value , and the slider to be moved accordingly. ... Scrollbars are not focusable, thus have no key bindings. The key bindings for the other range widgets (which are, of course, only active when the widget has focus) are do not differentiate between horizontal and vertical range widgets. ...

Atmospheric Discharge in the Tunguska Disaster . ... Based on the fact that an explosion of the Tinguska cosmic body, which caused trees to fall over a wide area, and radiant energy release during the Tunguska disaster were separated in space and in time, it is proposed that these events are interrelated but of different origin. We propose that the emission during the Tunguska disaster was caused by an atmospheric discharge at altitudes of 10-90 km above the Earth's surface. ...