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1. PSF Variations with Time / OTA Focus
The shape and width of observed PSFs varies slightly over time, due to the change in focus of the telescope. The focus variation consists of two terms: a secular change due to the ongoing shrinkage of the Metering Truss Assembly at an estimated rate of 0.25 ?m month -1 , and short-term variations, typically on an orbital time-scale (the so-called "breathing" of the telescope). ... See Figure 5.8 ). ... Figure 5.8: Measured OTA Focus Position (microns) as Function of Days since January 1, 1994. ...
[ Сохраненная копия ]  Ссылки http://www.stsci.edu/instruments/wfpc2/Wfpc2_hand2/ch5_psf8.html -- 10.6 Кб -- 29.08.2000
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2. OptInt PmWiki : PmWiki / Changes From Pm Wiki 1
OptInt PmWiki : Pm Wiki / Changes From Pm Wiki 1 . This page is intended to describe features of PmWiki 1.0 that have been changed or eliminated in PmWiki 2.0. ... ThisGroup:SideBar&action=edit Edit menu]] . ... action=post no longer exists -- posting a new page is now performed by using ?action=edit with the post control set to a true value. ... PmWiki's ReadPage() function no longer supplies default text for non-existent pages -- this is now decided by whatever functions need the page. ...
[ Сохраненная копия ]  Ссылки http://www.mrao.cam.ac.uk/projects/OAS/pmwiki/pmwiki.php/PmWiki/ChangesFromPmWiki1?action=print -- 15.7 Кб -- 01.03.2014
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3. Phil Plait's Bad Astronomy: Misconceptions
... Bad Astronomy . ... I think I will break from my usual format of Bad Astronomy/ Good Astronomy by saying that the way we define seasons currently is not strictly bad, but I feel (in my opinion!) that it could be better. The definition of when the seasons begin is at the moment of solstice or equinox; that is, winter (in the north) starts on December 22 nd and summer starts on June 22 nd . ... Now imagine breaking up the Sun's 46 degree up-and-down yearly swing into 1 day intervals. ...
[ Сохраненная копия ]  Ссылки http://www.badastronomy.com/bad/misc/badseasons.html -- 24.7 Кб -- 09.04.2016
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4. When Do UV Variables Change?
... A uv variable can change its value in any part of the uv variable stream. So it can change its value after each call to uvread , uvnext or uvscan . The uv routines which need to know if a uv variable has changed ( uvprobvr , uvcopyvr and uvupdated ) normally (i.e. by default) work on whether the particular variable(s) of interest has changed since the last ``mark'' in the uv stream. ... The uvmark routine provides greater control at marking the position in the stream. ...
[ Сохраненная копия ]  Ссылки http://www.atnf.csiro.au/computing/software/miriad/progguide/node25.html -- 4.1 Кб -- 05.02.2013
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5. Echelle for Beginners
Contact Russet McMillan (primary) or your Observing Specialists (secondary) for additional information. Contact Jack Dembicky for web page errors, corrections, ommisions, or additions. This page last updated: July 6, 2004 - JMD . This page last checked: September 14, 2003 - JMD . Configuring TUI to use the Echelle . Setting up the Echelle exposure parameters . Taking your Calibration lamps . ... Setting up multiple exposures . ... Stopping an exposure (discarding data) . ...
[ Сохраненная копия ]  Ссылки http://www.apo.nmsu.edu/35m_operations/35m_manual/Instruments/Echelle/Basics_HTML_Pages/Using_Echelle_with_TUI.html -- 4.5 Кб -- 27.10.2004
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6. The Face on Mars
... The Raw Images . Table 1: List of Viking Orbiter Images of the "Face on Mars" . ... Processing the Face Images . ... In July, 1976, Viking Orbiter 1 was acquiring images of the Cydonia region of Mars as part of the search for potential landing sites for Viking Lander 2. ... Using the height field, it is also possible to view the "Face" from different look directions, by mapping the Viking Orbiter image directly on the the topography and then placing the "viewer" at different locations. ... Mars . ...
[ Сохраненная копия ]  Ссылки http://www.arcetri.astro.it/irlab/Astro/solar/eng/face.htm -- 14.9 Кб -- 15.03.1998
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7. The Face on Mars
The Face on Mars . ... The Raw Images . Table 1: List of Viking Orbiter Images of the "Face on Mars" . ... Processing the Face Images . Table 2: Dimensions of Mercator Projected Images of "The Face on Mars" . Map Projected Images . ... Processing the "Face on Mars" Images . ... This page will provide interested persons with both the raw Viking images, transformed to GIF format, and a brief tutorial (with examples) of image processing techniques applied to create "better looking" images. ...
[ Сохраненная копия ]  Ссылки http://www.iki.rssi.ru/solar/eng/face.htm -- 12.7 Кб -- 15.10.1997
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8. A Slight Change - an Astronomy Net CCD Equipment and Techniques Forum Message
CCD Forum Message . Forums: . Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... Discussion Forums | CCD Tips and Techniques | ... A Slight Change . Forum List | ... I have one suggestion for change in your image gallery. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...
[ Сохраненная копия ]  Ссылки http://www.astronomy.net/forums/ccd/messages/76.shtml -- 13.6 Кб -- 09.04.2016
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9. http://www.naic.edu/~phil/callbn/tsysVstur22aug02.html
... The system temperature versus turret position has shown a bump (increase) for some receivers at the turret focal position. The receivers that had this increase also had platform focus curves where the platform focus position was lower than expected (or the horn was too high). ... After the focus change a 20 deg amplitude sine wave was done using the turret about the turret focus position. ... The plot shows the difference in Tsys versus turret position before and after the focus change. ...
[ Сохраненная копия ]  Ссылки http://www.naic.edu/~phil/callbn/tsysVstur22aug02.html -- 3.0 Кб -- 19.03.2003
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10. Appendix B: Changes from CSS1
... B.1 New functionality . ... B.3 Semantic changes from CSS1 . ... CSS2 builds on CSS1 and all valid CSS1 style sheets are valid CSS2 style sheets. The changes between the CSS1 specification (see [CSS1] ) and this specification fall into three groups: new functionality, updated descriptions of CSS1 functionality, and changes to CSS1. ... Several internationalization features, including list numbering styles , support for bidirectional text , and support for language-sensitive quotation marks . ...
[ Сохраненная копия ]  Ссылки http://crydee.sai.msu.ru/~vab/html.doc/css2/changes.html -- 9.0 Кб -- 12.05.1998
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11. Change history
... 09.11.2007 (VNY) Fixed a bug that could result in a crash of the task when processing crowded fields (SSC-SPR-3700); Restoring the omgsource flag when extracting the target spectrum: in the case when omgrism is called from the interactive tool omgsource the target spectrum shouldn't be extracted (fixing the SSC-SPR-3702); Added a parameter enabling the output of an additional region file that contains newly detected point-like sources (zero-order features); . ...
[ Сохраненная копия ]  Ссылки http://xmm.vilspa.esa.es/sas/7.1.0/doc/omgrism/node2.html -- 10.3 Кб -- 15.11.2007
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Еще в разделе: (Показать все результаты (>7231) - xmm.vilspa.esa.es/ )