Общий форум . Scientific.ru Все форумы . ... Давид Мзареулян, 26.06.2003 16:53 . ... Об определении инерциальной системы отсчета Давид Мзареулян, 22.06.2003 14:05 . Re: Об определении инерциальной системы отсчета Matigor, 23.06.2003 11:45 . ... Re: Физика на сфере Давид Мзареулян, 23.06.2003 16:07 . ... плеохроизм дымчатого кварца sleo, 23.06.2003 17:58 . ... Re: Об определении инерциальной системы отсчета sleo, 22.06.2003 14:40 . ... Re: карусель Давид Мзареулян, 22.06.2003 21:29 . ...

Optical Filters . The WFPC2 camera configuration and filter set require a substantial number of apertures for full utilization of its capabilities. ... An additional set of aperture names have been defined for use with the WFPC2 filters which require partial rotations. ... The pixel coordinates of these apertures will be reviewed on a regular basis to reflect changes in CCD and filter cosmetics. ... The aperture name is generally the same as the (rotated) filter name. ...

... Matrices and their invariants, such as order, rank, determinant, play an outstanding role in mathematics. ... To be a little more precise, nonzero square matrices of order $r+1$ (modulo multiplication by a nonzero constant) are represnted by points of the projective space $\Bbb P^{(r+1)^2-1}$. Geometrically, we consider the subvariety of matrices of rank one which is just the Segre variety $S=\Bbb P^r\times\Bbb P^r\subset\Bbb P^{(r+1)^2-1}$. ...

... A baseline vector is oriented from telescope 1 to telescope 2, i.e. the baseline coordinates are the coordinates of station 2 minus the coordinates from station 1. In the aperture plane, the coordinate increases to the East, and the coordinate increases to the North. ... In PEARL, a map on the sky is allocated with the -coordinate corresponding to RA, which increases to the left (East). The relationship between visibility and map is then . ...

... Content Model: Optional list header (LH), followed by one or more terms (DT) and definitions (DD). A definition list is a list of terms and corresponding definitions. Definition lists are typically formatted with the term on the left with the definition following on the right or on the next line. ... The definition list element can take the COMPACT attribute, which suggests that a compact rendering be used, and is appropriate if the list elements are small and/or the entire list is large. ...

Связывание переменной (binding of variable) - замена всех вхождений переменной некоторой константой , составным термом или экземпляром класса . ... Согласование акторов (coordination of actors) - действия, осуществляемые для обеспечения согласованности акторов некоторого процесса - попытка согласовать локальные значения общих переменных акторов процесса . ... Соответствие переменной актору (correspondence between variable and some actor) - то же, что " использование переменной актором ". ...

. Next: Routines of the Calibration Up: Coordinate Definitions used by Previous: Spatial coordinate systems Contents . Several calibration entities are time dependent, i.e., change on a time-scale given by the typical duration of an observation ( ksecs). Each corresponding CAL subroutine receives a time argument which specifies a point in time represented as ellapsed number of seconds since the fixed mission reference time . 1998-01-01T00:00:00.00 TT = 1997-12-31T23:58.56.816 UTC . Michael Smith 2011-09-20

... The first of the equations defines the position of the spectral orders, m , in the raw image, while the second equation gives, for each order, the dispersion relation in one dimension. ... where the coefficients are computed using least squares techniques on a grid , i.e. sample number and line number of points located within the spectral orders of the image. These points in the grid are found automatically by an order--following algorithm, normally using the FLAT or STD image. ...

Next: Displaying Images Up: Spectral Line Data Reduction Previous: Computation . A few comments are in order when using the imaging task, invert , to create spectral cubes (more information on invert can be found in Chapter 13 ): . To conserve space, invert produces a single beam dataset for all planes of a cube. ... That is, invert usually insists that no channels of a spectrum are flagged before that spectrum can be used for imaging. ... The slop keyword takes two values. ... VELSW . ...

... The European HST Archive has been moved to ESA's European Space Astronomy Centre ( ESAC ), Spain, where most of ESA's Space Science Archives are located and operated from. ... The Space Telescope European Coordinating Facility (ST-ECF), jointly operated by ESA and the European Southern Observatory ( ESO ) was, until the end of 2010, the European HST science facility, supporting the European astronomy community in exploiting the research opportunities provided by the Hubble Space Telescope. ...

... Font enhancements in Communicator include the ability to incorporate downloadable fonts into your web documents. ... The fonts are contained in a font definition file that reside on the host web server with the HTML document. ... Before you can create font definition files, make sure the fonts you wish to use in your web document are installed on your system. ... FONT> </P> . ... For more information about dynamic fonts, see: http://home.netscape.com/comprod/products/communicator/fonts/index.html . ...

Stellarium 0.12.3 . ... Classes . ... FileљStructure . ... StelToneReproducer Class Reference . ... Set the eye adaptation luminance for the display (and precompute what can be) Usual luminance range is 1-100 cd/m^2 for a CRT screen. ... Set the eye adaptation luminance for the world (and precompute what can be) More... љ . ... Return adapted luminance from world to display. ... Return adapted luminance from world to display with 1 corresponding to full display white. ... xyYToRGB (float *xyY) const . ...

lsst.tcc љ 1.2.2-3-g89ecb63 . ... Files . ... python . ... axis . coordConvWithFP.py . ... 22 љ def coordConvWithFP (fromCoordSys, fromPVTPair, fromPxPMRadVel, fromDir, toCoordSys, obj, inst, zeroPM, useGSWavelen): . 23 љ """!Convert a coord from one coordinate system to another . ... 35 љ @param[in] obj object block computed at desired desired TAI date of conversion . ... 50 љ obj = tcc.base.Obj(obj) # make a copy so I can change obj.site if useGSWavelen . ... tcc.axis.rotFromObs.rotFromObs . ...

... I would several points which we faced during our everysolved for better quality of individual ACs' and EOP products · There are two main EOP products provided by two IERS Product Centers on Earth Orientation (Earth Orientation Center (EOC) and Rapid Service/ Prediction Center (RSPC)). ... However, the latter is not provided by the IERS. ... ITRF · Using ITRF in computation of EOP series produced by various ACs seems to be a necessary condition to provide the consistency between the IERS products. ...

... To the definition of the right ascension of the AP orbits ascending node values . ... and the choice of the most favorable orbits which provide the auroral oval visibility . for two auroral imagers onboard. To provide the UVAI operation during whole nightside phase it is necesary to select the AP orbits . corresponding to the DTM, belonging to the time inerval within the borders marked by circles. The AP orbits corresponding to DTM interval within the borders, marked by squares, . ...

... Previous: Implementation Design of the ASC Data Model . ... We describe a coordinate library for AXAF data analysis. The library handles transformations between celestial coordinates and instrumental (mirror, focal plane, detector pixel) coordinate systems. ... Pixlib library is intended to perform AXAF Science Center (ASC) coordinate system data analysis. ... At the present, the library affords more than 50 transformations among ~20 ASC coordinate systems. ... is zero matrix and I unit matrix. ...

... There has been a heated public discussion in the past few years about whether our ninth planet is really deserving of the name. Since Pluto orbits a star, and is much less luminous, it certainly satisfies the definition we have above. The problem is actually not with Pluto, but with a very large number of other bodies in our Solar System which also satisfy this definition, but which are not called planets. Perhaps the most notable of these is Ceres, the largest asteroid. ... Planet . ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

... sin f = y / r . cos f = x / r . ... They are now viewed as new definitions of the sine and cosine, for the polar angle f given by x and y ( a slightly different way of formulating this definition is described further below ). ... sin 2 f + cos 2 f = 1 . ... Angle . ... Many trigonometry texts define the sine and cosine slightly differently, using the so-called unit circle . ... Then the distance AB ("the sine line") equals sin a , and the distance OA ("the cosine line") equals cos a . ...

... 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. ...