... We describe a new library (AST) which provides a flexible high-level programming interface for handling world coordinate systems in astronomy and for producing graphical output. ... Relationships between coordinate systems are represented within AST by objects called Mappings. ... While Mappings represent the relationships between coordinate systems, the coordinate systems themselves are represented by objects called Frames. ... Like all objects, a Frame also provides methods. ...

The FITS "World Coordinate System" (WCS) standard defines keywords and usage that provide for the description of astronomical coordinate systems in a FITS image header. ... I: "Representations of world coordinates in FITS" , Greisen, E.W. & Calabretta, M.R. (2002), Astronomy & Astrophysics , 395 , 1061-1075. ... This diagram illustrating Bonne's projection with conformal latitude +35 was produced by WCSLIB , a C implementation of the coordinate transformations defined in the FITS WCS papers. ...

... This has two reasons: (i) the logarithmic potential has no escape velocity so that it is more difficult to represent the VP on a finite velocity array; and (ii) the VP becomes discontinuous in the limit beta --> -infinity (only circular orbits), and singular in the limit beta --> 1 (only radial orbits) (e.g., van der Marel Franx 1993). ... The Gauss-Hermite moments obtained with both approaches agree well, and with the results in van der Marel Franx. ... Roeland van der Marel, marel@stsci.edu . ...

... CoordConv is written in C++ and Python, using SWIG as the C++ wrapper. ... In Python the following will convert an FK5 J2000 position to apparent topocentric coordinates at a specified TAI date: import coordConv taiDate = 4916391905 # TAI date in MJD, seconds site = coordConv . Site (-105.822616, 32.780988, 2788) # Apache Point Observatory 3.5m telescope # For better accuracy you may also specify UT1- TAI and pole wander in site ; # these may be obtained from IERS Bulletin B fk5Sys = ...

... 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. ...

Diamond's Stealth 64 Video VRAM is the perfect choice for graphics and video performance. ... The Diamond Stealth 64 Video continues our award-winning tradition, delivering the best price / performance multimedia accelerators available. ... 64-bit graphics performance . ... Designed around a solid 64-bit graphics engine, the Stealth 64 Video VRAM provides unparalleled performance in any environment. ... The Stealth 64 Video VRAM includes hardware to accelerate video playback on the Windows desktop. ...

... deceit is distributed with the following Perl functions that can be used to fill the dataset with data from text files. rows . ... fillColumn . The function signature is as follows: the first argument must be the variable col , the second the name of a text file from which the data is to be extracted, the third argument an integer denoting from which column in the text file data should be extracted. ... Vector columns in the text file are delimited by the separator character. ...

... Content Model: %text, but no nested anchors . The anchor <A> element is used to define the start and/or destination of a hypertext link. In previous versions of HTML it provided the only means for defining destination anchors within documents, but you can now use any ID attribute as a destination anchor so that links can now be made to divisions, paragraphs and most other elements. ... CLASS . ... This attribute is used to define a named anchor for use as the destination of hypertext links. ...

... Directives | ... Apache HTTP Server Version 2.4 . Apache > HTTP Server > Documentation > Version 2.4 > Modules . ... Core Authentication . ... This module provides core authentication capabilities to allow or deny access to portions of the web site. mod_authn_core provides directives that are common to all authentication providers. AuthName . AuthnProviderAlias> . ... The example below creates two different ldap authentication provider aliases based on the ldap provider. ... Directory> . ...

grdfft - Perform mathematical operations on grdfiles in the frequency domain grdfft in _ grdfile -G out _ grdfile [ -A azimuth ] [ -C zlevel ] [ -D [ scale |g ] ] [ -E [ x|y ][ w ] ] [ -F [ x | ... The horizontal dimensions of the grdfiles are assumed to be in meters. ... Append a scale to multiply by (kr * scale ) instead. Alternatively, append g to indicate that your data are geoid heights in meters and output should be gravity anomalies in mGal. Default is no scale]. ...

Cameras for TDI Applications Princeton Instruments offers several rectangular format cameras that are ideal for TDI applications, which require high resolution in one direction only. This allows for a lower cost system with the same high dynamic range and performance of square format imaging arrays. ... TDI Applications Imaging of conveyor belts is a common industrial application of TDI. ... Many non-destructive inspection applications require economical high resolution Xray imaging. ...

XmCCD ----- The programs provided here offer a Linux graphical user interface to astronomical and scientific CCD cameras. ... SBIG has provided the library used here. It is essentially the same library used by commercial software for control of their cameras under Windows. ... This distribution includes source code to utilize the Santa Barbara Instrument Group (SBIG) shared library libsbigudrv.so with a Motif-based graphical user interface program to control SBIG astronomical CCD cameras. ...

The Network Time Protocol (NTP) is used to synchronize the time of a computer client or server to another server or reference time source, such as a radio or satellite receiver or modem. ... Information on the NTP architecture, protocol and algorithms can be found in the following articles and reports, which are available online . Mills, D.L. Internet time synchronization: the Network Time Protocol. ... Mills, D.L. Network Time Protocol (Version 3) specification, implementation and analysis. ...

NIST Spetial Publication 500-220 . Guide on Open System Environment (OSE) Procurements . ... An Open System Environment encompasses the functionality needed to provide interoperability, portability, and scalability of computerized applications across networks of heterogeneous, multi-vendor hardware/software/communications platforms. ... The Open System Environment concept has become ubiquitous throughout both the public and private sectors. ... ACQUIRING AN OPEN SYSTEM ENVIRONMENT 11 . ...

... 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. ...

Home About Meade Product Information Dealer Locator Customer Support Investor Relations Dealer Support Employment Opportunities Site Map . Meade Instruments Corporation . ... The Autostar/LX200 Command Set . ... The LX200 Command Set may be used to write custom software for remote operation of an LX200 telescope with a personal computer. ... The name Meade and the Meade logo may be used only with permission from Meade Instruments Corporation. ... Autostar Downloads . ... product information | ...

... The IRAF environment provides three coordinates systems: . physical: image pixel coordinates used in the reference (original) image. logical: image pixel coordinates, relative to the current section and size of the image. ... 22:13:53.7 44:28:53.9 - the usual representation of RA, Dec . ... Logical, physical and world coordinate systems are all supported in the PROS software, and regions can be specified with any combination of them. ... c 22:13:53.7 44:28:53.9 8 . ... physical: 6930 9390 240 . ...

Mathematics from the class of 2000 (section B) of the 57th school (in Russian). These problem sets, originally given in seminars, are available in TeX format, PostScript, and as Hewlett-Packard laser printer files. The syllabus "math-student" (in Russian) describes the traditional range of topics studied in math classes. ... Math Competition by Correspondence (in Russian). ... These Zip files contain problems from various years. ...

... Astrophysics Group . ... Optical Interferometry . OIFITS: A Data Exchange Standard for Optical (Visible/IR) Interferometry . ... OIFITS is a standard for exchanging calibrated, time-averaged data from astronomical optical interferometers , based on the FITS Standard (OIFITS is a registered FITS convention ). ... The OIFITS standard is used in the biennial optical interferometry Imaging Beauty Contests: . ... A data exchange standard for optical (visible/IR) interferometry. ...

This module illustrates many of the aspects of the Apache 1.2 API and, when used, demonstrates the manner in which module callbacks are triggered by the server. ... Source File: mod_example.c . ... The files in the src/modules/example directory under the Apache distribution directory tree are provided as an example to those that wish to write modules that use the Apache API. ... Example . ... Uncomment the "AddModule modules/example/mod_example" line near the bottom of the src/Configuration file. ...