Astronet Поиск по астрономическим сайтам English Russian
       
        Точная форма слов   О проекте   Сайты   Справка
Поиск по:www.apo.nmsu.edu   - Поискать по всем серверам
На этой странице приведены все страницы сервера www.apo.nmsu.edu ,которые мы индексируем. Показаны документы 2801 - 2817 из 2817.

В начало ] Пред. | 132 | 133 | 134 | 135 | 136 | 137 | 138 | 139 | 140 | 141

Упорядочить по: URL  |  дате изменения
2801. Conical baffle mandrel
... However, to avoid excessive central obscuration, a conical baffle is necessary in addition to the usual primary and secondary baffles. ... It is to be formed of graphite fiber reinforced plastic because of the high stiffness to weight ratio of this material. ... Consequently, it will be formed on a machined aluminum mandrel. The conical baffle mandrel was machined by Machinists, Inc. Seattle, WA) the week of 15 December 1996. ... Grooves are machined in the outer surface of the mandrel. ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Site/SDSS.progress/19961223SDSS/19961223SDSS.html -- 3.3 Кб -- 08.03.1997
Похожие документы

2802. Guider Mechanical Commands
... PISTON piston . ... this command is not used by the TCC The guide camera mechanical controller sets the filter, focus and other mechanical functions, but not the position of the guide camera in the focal plane. Positioning, if available, is handled by one or two guider position axes controllers , one per axis of motion. ... Notifies the controller that subsequent commands apply to the guider mechanical controller. ... Sets the piston of the guider to the specified value (in decimal microns). ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/HardwareControllers/GuiderMechCommands.html -- 5.9 Кб -- 14.03.1995
Похожие документы

2803. Performance of the 3.5m Telescope
Russell Owen , Charles Hull and Walter Siegmund The Apache Point Observatory 3.5m telescope, located in the Sacramento Mountains of New Mexico at an elevation of 2.8 km, is awaiting the installation of the primary mirror. ... Important features of the design include a fast (f/1.75) lightweight honeycomb mirror, a compact altitude/azimuth mount, friction-coupled drives and position encoders, and use of a telescope model to compensate for mechanical errors (1) . ... Table 1: The current telescope model. ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/performance/performance1990.html -- 11.5 Кб -- 24.11.1994
Похожие документы

2804. Performance of the 3.5m Telescope
... The 3.5 meter optical telescope is an altitude over azimuth mechanical structure with Ritchey-Chretien optics. ... These are coupled by friction to large diameter drive disks on each axis. ... The telescope project design phase started in 1983. ... The secondary and tertiary mirrors are lightweight borosilicate hot gas fusion blanks and were fabricated by Hextek, Inc., ... Drive torque is transmitted to the altitude structure via the large diameter drive disk mount on the underside of the mirror...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/performance/performance1988.html -- 13.8 Кб -- 24.11.1994
Похожие документы

2805. Offsetting a Telescope
... Traditionally a local observer offsets the telescope using a handpaddle control, nudging the telescope in small steps. ... When using a rotating field of view, the user sees and can move the "boresight", the center of rotation of the field of view on the instrument. ... The object position is actually defined as the position of the sky at the boresight. ... The graphical offsetter implements an offset by changing the object offset and boresight position but not the sky orientation. ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/offsetting/Offsetting.html -- 14.2 Кб -- 24.11.1994
Похожие документы

2806. Coordinate Conversions
... To track an object, the user specifies the object's position and also the desired orientation and position of the object on the instrument. The control system converts these to the position of the telescope and instrument rotator. Positions may be specified in several different coordinate systems, including FK4 (IAU pre-1985 RA/Dec), FK5 (IAU post-1985 RA/Dec) and apparent geocentric coordinates. ... Figure 1: Sequence of coordinate conversions. ... The user selects this position. ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/coord_conversion/coord_conversion.html -- 15.1 Кб -- 24.11.1994
Похожие документы

2807. Secondary Commands
... Commands . ... MOVE piston x-tilt y-tilt x-trans y-trans . ... TILT x-tilt y-tilt (*) . ... this command is not used by the TCC The secondary mirror controller adjusts the secondary mirror's position in up to five axes to maintain collimation and focus. ... Hardware resets the controller and halts any motion. ... Notifies the controller that subsequent commands apply to the secondary mirror. ... Note: The mirror positioners have finite resolution, so requested piston and tilt are rounded. ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/HardwareControllers/SecondaryCommands.html -- 7.1 Кб -- 18.11.1994
Похожие документы

2808. Temperature Measurement System For A 3.5-Meter Borosilicate mirror
... The design, fabrication and testing of a reliable, low-cost, multiplexed temperature measurement system with a resolution and stability approaching 0.01њ C is described. This system, with 176 temperature sensors, will be used to monitor the performance of a 3.5 m borosilicate mirror ventilation system. ... We have assembled and tested a simple and reliable temperature measurement system with 176 sensors and a differential drift over two weeks of less than 0.07њC peak to peak. ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/SPIEpapers/temperature/temperature.html -- 13.7 Кб -- 21.09.1994
Похожие документы

2809. Biblography
Angel, J. R. P.,and Hill, J. M. 1982, Manufacturing of Large Glass Honeycomb Mirrors , Proc. S.P.I.E. 332, 298. ... Beckers, J. M., Williams, J.T. 1982, Performance of the Multiple Mirror Telescope (MMT) III. Seeing Experiments with the MMT , Proc. S.P.I.E, 332, 16. ... Forbes, F. 1982, Wind Loading of Large Astronomical Telescopes , Proc. S.P.I.E. 332, 198. ... Ulich, B. L. 1982, Performance of the Multiple Mirror Telescope (MMT) V. Pointing and Tracking of the MMT , Proc. S.P.I.E., 332, 33. ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/milt/biblography.html -- 4.3 Кб -- 13.12.1993
Похожие документы

2810. Acknowledgments
... Roger Angel Steward Obs John Africano KPNO Larry Barr KPNO Jacques Beckers MMTO Bob Briedenthal UW Larry Burris Perkin-Elmer Clyde Chivens Perkin-Elmer Dave Chivens L F Norm Cole Cole Optical Butch Daughn MMTO Don Davidson Howard DeMastus SPO Dave Dittmar UT Herman Dittmer Seattle, WA Dick Doane KPNO Dick Dunn SPO Harland Epps UCLA Fred Forbes KPNO Bob Gehrz Univ of Wyoming Paul Gillett ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/milt/acknowledgments.html -- 3.0 Кб -- 13.12.1993
Похожие документы

2811. Appendix
... Incremental cost is therefore limited to a simple 16-bit up down hardware counter interface buffer for the interpolator and 9 bits of a 16 bit port for the absolute encoder. Teledyne-Gurley Model 8626, 2 required @ $1400 $2800 Complete Duplicate Spares $2800 . BEI Model M25, 2 required @ $1000 $2000 Complete Duplicate Spares $2000 . ... Datacube VG-120 Multibus video interface $3000 Spare $3000 Panasonic B/W CCD camera, 2 req'd @ $1000 $2000 One spare camera $1000 . ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/milt/appendix.html -- 2.4 Кб -- 13.12.1993
Похожие документы

2812. Enclosure
A successful telescope enclosure must satisfy several requirements: First, it must survive often severe mountain top weather. ... The enclosure must support a 5 ton bridge crane which will be used to handle the primary mirror, the secondary assembly, and instruments. ... The roof, upper surfaces of shutter panels, and shutter tracks will be heated during snow storms in order to remove snow. ... Hatches and doors will be sized to accomodate the primary. ... The hatch is opened on the next floor down. ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/milt/enclosure.html -- 29.5 Кб -- 13.12.1993
Похожие документы

2813. Telescope Control System
System requirements which apply directly to control system design are listed in Section 1-6. ... All telescope control is via commands passed to the telescope control computer (TCC) via a user at a keyboard, or from another computer. ... The microcomputers effectively relieve the TCC from a large amount of real time control and create convenient modularity of system hardware functions. ... Each implements the digital state variable control system for that axis. ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/milt/telescopecontrol.html -- 42.1 Кб -- 13.12.1993
Похожие документы

2814. Structure
... The line item which applies to the telescope structure is tracking. ... Item Allowance (arc sec) Wind loading Structure 0.05 rms Control system 0.02 Misc control system error Uncorrelated with wind 0.04 Total tracking error 0.08 . ... The effects are the rotation of the optical axis (defined by the primary mirror), the tilt of the secondary with respect to the optical axis, and the translation of the secondary with respect to the optical axis. ... Static loading with the OSS pointed at the zenith. ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/milt/structure.html -- 62.1 Кб -- 13.12.1993
Похожие документы

2815. Optics
MILT will be the first major telescope to utilize a very lightweight monolithic cast honeycomb Pyrex primary mirror. ... It is based on 395 rms image diameters measured from plates taken with the Solar Telescope (76 cm aperture) over a one year period. ... The consensus among ARC astronomers is that the best rms seeing disk should be sampled by no fewer than 5 detector pixels (one dimension) when the telescope is in its minimum optics 'clean' configuration (no reducing camera). ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/milt/optics.html -- 21.5 Кб -- 13.12.1993
Похожие документы

2816. MILT Description
... This is possible at modest cost due to the low moments of inertia of the telescope and enclosure. ... This same performance will be achieved in higher winds when the telescope enclosure is facing away from the wind, or by using wind screens. ... The telescope system (MILT) will be remotely operable with an on-site operator's assistance by an astronomer located at one of the ARC member institutions. ... Mean Wind Speed . ... Offsets > 10 deg: 1 arc sec rms max . ... 5 sec max, tracking to tracking . ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/milt/description.html -- 8.3 Кб -- 13.12.1993
Похожие документы

2817. MILT Multiple Instrument Large Telescope
... MILT Description . ... Telescope Control System . ... Biblography The Astrophysical Research Consortium (ARC) consists of astronomers at the following institutions: University of Washington, University of Chicago, New Mexico State University, Princeton University, and Washington State University. ... In addition some advancement in the art and engineering of large telescopes will be pursued. The telescope design itself is one of three major project tasks. ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/Telescopes/eng.papers/milt/milt.html -- 2.8 Кб -- 13.12.1993
Похожие документы

В начало ] Пред. | 132 | 133 | 134 | 135 | 136 | 137 | 138 | 139 | 140 | 141

Rambler's Top100 RFBR Яндекс цитирования