The azimuth encoder rack gear is mounted on the inside of the azimuth ring girder. The azimuth encoder turns on this gear as the azimuth moves 0 to 720 degrees. ... The software assumes that this arc length along the encoder rack gear is correct (at a constant radius of 127/2 feet). The error in the radius of the rack gear becomes an azimuth error. To measure the error in the azimuth encoder rack gear, jon hagen built a proximity sensor. ... To compute the az encoder runout error: . ...

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FOC Instrument Handbook Version 5.0 3 2.0 COSTAR OVERVIEW COSTAR replaces the High Speed Photometer in the Axial bay of HST, in the \GammaV2, +V3 quadrant (see Figure 7). ... Before COSTAR, the aberrated F/24 OTA beam at 6.565 arcminutes from the V1 axis formed an image at the FOC focal plane aperture 110mm from the V1 axis. ... Firstly, the focal plane tilt of the OTA at the FOC entrance apertures cannot be duplicated by the 2­mirror COSTAR system. ... FOC Instrument Handbook Version 5.0 5 Figure 2. ...

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• Overall Instrument Description
• Rodger Doxsey - How HST Works

Sloan Digital Sky Survey Telescope Technical Note 19970728 Edward J. Mannery and Walter Siegmund . ... Common corrector mount inspection . ... The corrector nearest the secondary mirror, the common corrector (so named because it is common to both imaging and spectroscopic configuations) is located with respect to the telescope optics support structure by the common corrector mount. ... The fused silica common corrector is 32.5 inches in diameter and is 0.47 inches thick. ...

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• Measurements of 3.5-m Secondary Mirror Motions
• Pointing error budget
• Figure 1

The picture above was made with this demo POV file and this Mirror object POV file . ... This is a magnifying mirror with a light around it, on an articulated arm, designed for wall-mounting. ... Behind this mirror in the image are two more mirrors, one above showing the front, and one below showing the arm in a bent position, and the whole thing roated so that you are effectively looking "up" at it. ... The two images below show details of the base, and the back of the mirror. ...

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• Tom's POVRay Hand Shower

... Gallery . ... Drive mechanisms are still mounted inside theтАж . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . ... Title: Drive mechanisms are still mounted inside the tower. Description: NOTE: All images and movies are copyright and must not be reproduced or mirrored in any form without written permission. ... NOTE: All images and movies are copyright and must not be reproduced or mirrored in any form without written permission. ...

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• RSAA website - Intranet - ANU

... It consists of two energy-angle analyzers EA-2 and EA-3 for low energy particles, and two identical oppositely directed time-of-flight (TOF) analyzers EM-1-1 and EM-1-2 for high energies. ... Analyzers of low energy charged particles (EA-2 and EA-3). ... The instruments allow to measure simultaneously in eight angular sectors evenly distributed in the angle 2 perpendicular to the satellite rotation axis, and sequentially in 7 energy intervals for each angular sector. ... Interval . ...

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• Solar array
• Magion History
• Radiometric Complex Traverse

Image Quality and Stability Criteria Alex Rea adr34@cam.ac.uk Cavendish Lab oratory, University of Cambridge FTT Meeting Friday 7th May 2010 Alex Rea ( Cavendish Labs, Cambridge ) Image Quality and Stability Criteria 7th May 2010 1/9 Off-Axis Angle · MTF reference surfaces · MRTD test systems · Spectrograph mirrors ... Image Quality and Stability Criteria 7th May 2010 9/9 Alex Rea (Cavendish Labs, Cambridge) ...

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• Astrophysics Group COAST Technical Details

Domes Forum Message . ... Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... Trailer Mounted Dome Enclosure . ... Posted by John Huggins on April 12, 2001 11:39:42 UTC . Has anybody put together a trailer mounted telescope with a dome or other enclosure on top? ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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... ASRAS HOME . ... Mees Observatory . ... Site . ... Weather forecast will be correct for the Farash Center . ... Through gracious donations from Marion and Max Farash and the Louis S. Wolk Foundation, ASRAS has been able to acquire a large piece of land well away from the city lights. ... The Marian and Max Farash Center for Observational Astronomy consists of an education center, maintenance building and 6 working observatories on a 17 acre plot of land just off route 64 in the hamlet of Ionia, NY. ...

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Next: Checking for disk errors Up: Filesystems Previous: Mounting and unmounting . ... A filesystem's correctness and validity can be checked using the fsck љ command. ... This allows e2fsck љ (the version of fsck љ for the ext2 filesystem) to avoid checking the filesystem if the flag indicates that the unmount was done (the assumption being that a proper unmount indicates no problems). ... Use fsck љ manually to check other filesystems, e.g., floppies. ...

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• Mounting and unmounting
• Slide 6
• Armagh Observatory

Next: Calar Alto 2.2m observations Up: Spectral observations and data Previous: Spectral observations and data . ... A 2'' diameter circular aperture was centered on the brightest part of the target galaxy or on the star-like candidate, and a similar aperture was placed 20'' off along the direction zenith-nadir to accumulate simultaneously the night sky spectrum. ... Next: Calar Alto 2.2m observations Up: Spectral observations and data Previous: Spectral observations and data root . ...

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• SCORPIO adapter

... Both sets of objective transmission gratings consist of hundreds of co-aligned facets mounted to supporting structures on 4 annuli (one for each of the four co-aligned mirror pairs) to intercept the x rays exiting the HRMA. ... The two sets of transmission gratings, attached to the mounting structure are shown in Figure . ... An individual facet has 0.43-m-thick gold grating bars with 50% filling factor and 9920- period, resulting in 1.15-/mm dispersion. The HRC-S is the primary LETG readout. ...

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• FORS1 mounted at ANTU
• Mounted image 008: VLT panorama | ESOshop
• Mounted image 104: The Sun hides behind APEX | ESOshop

... In essence, you have an equatorial telescope mount for your camera to track the stars anywhere in the sky. ... Astronomy Camp for All Ages . Astronomy Campers use the research telescopes and equipment at the mountain-top observatories on Mt. ... At night, Campers observe celestial objects under a dark sky using the 40-inch and 60-inch telescopes on Mt. ... A complement of computers allows Campers to analyze data using professional languages and to simulate astronomical phenomena. ...

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• ASP: Light Pollution

... All the optical elements are mounted in a cryostat aimed at keeping components at a temperature of about 80 K. The focal plane masks (field stops or slits) are mounted on a wheel. ... The collimator is an achromatic doublet lens, which images the entrance pupil of the TNG and provides an almost parallel beam (F-number about 2000) at the pupil plane, where Lyot stops can be placed. Right after the pupil plane, two close wheels mount filters and grisms. ...

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• Optical System
• Procedures for Data Reduction
• FIRPO Quick Guide

The Spectrograph is intended for multiobject spectroscopy up to 75 objects within the BTA field of view with medium spectral resolution. ... Fibers are shorter then 0.5 m in length and transmit near 80 % of light in the spectral range 3700-9600 A. Fibers are organized in block unit with the possibility to change together with mask. ... The mask has two additional holes to hold a pair of fibers of 3(26") mm in diameter to project the images of stars needed for adjustment the field and guiding. ...

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• Feed cabin Nr.1
• SCORPIO adapter
• From Power Up To Bash Prompt: Init

Astronomy Picture of the Day . ... Pictured above is one of the world's premiere radio astronomical observatories: The Very Large Array (VLA). ... The Pleiades contains over 3000 stars, is about 400 light years away, and only 13 light years across. ... APOD is One Year Old Today . ... The first Astronomy Picture of the Day (APOD) appeared one year ago today. ... Walking in Space . ... Pictured above is the first american astronaut to walk in space: Edward White. ... Vela Supernova Remnant in Optical . ...

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... You are here: start €Ё correlator €Ё loaddisks . ... Note: as we seldom (never?) use NFS mounting now, it is usually OK to simply unmount the Xraids, power off, change disks, power on and mount the new disks. ... Check contacts on disks (and in XRAID if possible) before inserting into XRAID chassis. ... sudo /nfs/apps/vlbi/refresh_xraid . ... Create the mount points for the xraid (if the SCSI device has changed we'll need new mount points accordingly) > sudo /nfs/apps/vlbi/udevrules.pl . ...

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• lbaops:observingnotes [ATNF VLBI Wiki]
• VLBI Wiki | Main / ObservingNotes
• Central Processor Platform CentralProcessor 0.11 documentation

... Submitted by Paul Valleli on 01/16/2007 15:38:53 . HET Secondary Corrector System Alt-Az Mount . A spherical primary can be corrected for Spherical Aberration,Coma, and Astigmatism with a Mangin -Relay lens Combo (ATMoB member Don Dilworth design) or with a modified Abbe Reflector-Corrector - requires spacing, tilt, and decenter adjustments. Another way is with a strongly Hyperbolic secondary -very tiny FOV . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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The Planewave Instruments 20-inch (0.5-meter) f/6.8 corrected Dall-Kirkham telescope at Moore Observatory in Kentucky and its identical companion at Mt. ... The CDK20 North at Moore Observatory has been our primary platform for developing technology for remote and robotic operation in the Shared Skies program. ... g'r'z'i' filter wheel . ... Axis quad video server to send realtime video to the remote observer . ... Telescope monitor camera in the dome also on the video server . ...

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• University of Louisville Research Telescope at Mount Kent
• 21-inch Moore Telescope
• Lx Motion