... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2002 October 22 . A Small Double Ozone Hole in 2002 . Credit: SVS , TOMS , NASA . Explanation: As expected, the ozone hole near Earth's South Pole is back again this year. ... Ozone is important because it shields us from damaging ultraviolet sunlight. ... About APOD | ... NASA Technical Rep.: ... A service of: LHEA at NASA / GSFC . ...

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Next: *.imh and *.qp Extensions Up: IRAF/PROS Files Previous: IRAF Image Arrays . The x-ray data are stored in QPOE files (Quick Position-Ordered Events, *.qp ) rather than image arrays. ... Note that, unlike IRAF images, QPOE files have no associated header file, and are always stored in the current directory, unless explicitly specified otherwise. Non-PROS IRAF tasks can also access QPOE data files in place of image arrays. ... rp110590.qp[pi=2:30] . ... The ROSAT PSPC qp file images are . ...

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Next: Scratch Files Up: Miriad Datasets Previous: Listing Datasets - PRTHD . ... A dataset contains several kinds of data, called `items', . Items can be quite small (e.g. a single number), intermediate in size (e.g. the history item, use to store history information), or very large (e.g. the image item in an image dataset, which is used to store the pixel data, or the visdata item in a visibility dataset, which contains the correlations). ...

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Stellarium 0.12.3 . ... Classes . ... Scripting . ... Scripting Engine . ... Script Console . ... Since version 0.10.1, Stellarium includes a scripting feature based on the Qt Scripting Engine . ... Prior to version 0.10.0, Stellarium used a different scripting engine called StratoScript . ... Prior to version 0.10.0, Stellarium had a simple scripting engine, known as StratoScript . ... This script prints "Hello Universe" in the Script Console output window. core.debug( "Hello Universe" ); . ...

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I'm interested in the structure of interstellar ``clouds'' (filaments, sheets, or whatever) of gas and dust over a wide range of scales, from Galactic spiral arms to AU-scale features -- also how these structures form and interact. ... The possibility of clumpy dust scattering in the Pleiades reflection nebula, which might explain its otherwise surprising UV scattering properties . ... Intricate structure of H I emission and self-absorption in the CGPS . ... Fractal studies of molecular clouds . ...

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... In this paper, a project aiming to allow access to data archives by means of a query-by-example mechanism is described. The basic user query would simply be the submission of an input image, either 1-D or 2-D; the system should allow retrieval of archived images similar to an input one on the basis of some ``resemblance parameter". ... A system called QUBE is currently being designed to support the QUery-By-Example paradigm in accessing astronomical data archives. ... the QUBE User Interface. ...

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... Apache HTTP Server Version 2.4 . ... On systems with multiple users, each user can be permitted to have a web site in their home directory using the UserDir directive. Visitors to a URL http://example.com/~username/ will get content out of the home directory of the user " username ", out of the subdirectory specified by the UserDir directive. ... Per-user web directories . ... the URL http://example.com/~rbowen/file.html will be translated to the file path /home/rbowen/public_html/file.html . ...

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Next: Scan Distortion Up: Restoration of FOC Imaging Previous: Frame Size and . ... The image has had an unsharp masking technique applied in order to make the various defects and blemishes more obvious. ... This grid comprises 17 rows and 17 columns with a nominal spacing (prior to detector distortion) of 60 pixels. ... The occulting fingers, which cast very clear shadows on the full format science data, project into the images from the top right and bottom left edges of the frame. ...

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... Just as magnetic storms are composed of substorms, the substorms themselves seem to be composed of smaller scale events. ... steplike expansion of the auroral bulge (Vorobjev and Rezenov, 1973; Sergeev and Yahnin, 1979; Murphree and Cogger, 1992; Nakamura et al., 1993) . ... 1990) . ... fine structure in the bursts of bremsstrahlung X-rays (Lazutin et al., ... Nakamura, R., T. Oguti, T. Yamamoto, and S. Kokubun, Equatorward and poleward expansion of the auroras during auroral substorms, J. Geophys. ...

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... Table data are arranged in columns and rows, and stored in MIDAS files with the extension .tbl . ... An item in a table is accessed by giving its column and row in addition to the table name. The row number can either be given as an absolute value (i.e. the sequence number) or indicated by the value in a previously defined reference column. ... A table can be always expanded in the sense that its number of columns and rows is automatically increased when the allocated space is exceeded. ...

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Next: Functionality Up: RGS_EXAFS Previous: RGS_EXAFS Contents . EXAFS means Extended X-ray Absorption Fine Structure. This CCF describes the detailed absorption lengths of different layers of CCDs in the vicinity of absoption edges to facilitate accurate calculation of quantum efficiencies. Away from the edges, the well-known Henke coefficients are used. There are two notable RGS instrumental absorption features by oxygen and fluorine. ... Michael Smith 2011-09-20 ...

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A directory is a file that holds other files and other directories. ... Having your own directory structure gives you a definable place to work from and allows you to structure your information i