... 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 Further Information and Bibliography page. The Building and Installing the Distribution page presents an overview of the procedures for compiling the distribution and installing it on a typical client or server. ...

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• Further Information and Bibliography
• Sternberg Astronomical Institute
• Time and Time Interval Measurement with Application to Computer and Network

... Generally, astronomical data archives are open to public. ... The data format?so called FITS. Yet, ASCII format catalogues are available (for example, VizieR , http://vizier.u-strasbg.fr/viz-bin/VizieR) . ... Here, I attach an email from 2006 Astrostatics Summer School at PSU , who kindly answer to my question on how to read files in FITS format. ?????????????from Patrick . ... The tool you want in this package is called dmlist , with a syntax like this to dump the data to an ASCII file: . ...

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• The AstroStat Slog Blog Archive Learning R
• The AstroStat Slog 2007 January
• General Introduction

... This information may be for older NA2 filters?? Filters There are 7 filter positions, containing the following filters from Custom Scientific . ... 0 - Bessell R . ... The only filter requiring a focus offset is the ND2 + R filter which will be measured on the sky. ... The red filter attached to the ND2 in position 6 is not the same as the Bessell R. Number 6 is an RG610 red glass filter ( Rolyn 65.1355 ) for the 610 nm cut-on. ... Focus . ... Guider Mechanical Controller (filter and focus) . ...

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• Facility.html
• ARC 3.5m: | Passwords

Computer Ephemeris. Second order reduction quantities. Explanations. This page consist of four little tables. First and second tables contains J a (in 0.000001 s ) and J d (0.0001") for nothern declination, third and fourth contains the same information but for southern declination. Each table have 13 informational columns headed with right ascension values, and some amount of rows, labelled with date. ...

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• Reduction quantities for Dynamical time. Explanations for Computer Ephemeris.
• Lunar pericenters. Explanations for Computer Ephemeris (DE200/LE200).
• Lunar phases. Explanations for Computer Ephemeris.

Next: ASTROMET/EDIT Up: Available Commands Previous: Available Commands . This command computes the astrometric transformation parameters for the input data set using a least-square fitting algorithm. The input data is assumed to be two MIDAS tables with fixed columns names. ... ASTROMET/TRANSFORM only computes the transformation parameters. ... R_A Real column containing the right ascension in degrees; . ... XCEN Real column to contain the X measurement; . ...

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• ASTROMET/COMPUTE
• Hardware Setup
• Special Functions

... VMS users have the following compilers available: C, C++, Pascal, FORTRAN, and MACRO--which is a low-level language. ... Create a source file containing valid program statements as defined by the language. ... Run the program. ... FORT RECALC $ LINK RECALC $ RUN RECALC When you write your programs, your source files should always have a file type that identifies the programming language being used. ... Users create a source file of MACRO statements and then compile, link, and run, the file. ...

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• Processing Dithered Data
• For the New User...
• Libraries

... We distribute the following software (free of charge): . ... The version we distribute has been adapted by P.Ganelin, S.Lvovsky <serge (at) mccme.ru>, and A.Shen <shen (at) mccme.ru> to work with Russian texts. It is available via ftp . ... The russified teTeX for Linux, made by A.Shen <shen (at) mccme.ru>. ... The russified MiKTeX 2.0 for Windows is also available via ftp . ... If you see any errors on this page, please write us <compwww (at) mccme.ru> ...

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• Computers

This appendix only contains links to pages describing various Fortran 90 systems. ... Fujitsu Fortran 90 Compiler (Fujitsu WWW) . Fujitsu Fortran 90 Compiler (Unicomp WWW) . ... Fortran PowerStation 4.0 from Microsoft . Lahey Fortran 90 from Lahey Computer Systems , Nevada, USA . ... An additional compiler will be available from Absoft towards the end of 1996. ... Lahey LF90 v2.0 from Lahey Computer Systems, PO Box 6091, Incline Village, NV 89450-6091, USA, Email: sales@lahey.com . ...

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• The new precision concept
• XFree86/OS2 Available Ported Software - Libraries
• Introduction

A very important stage in a story of formation of any new science is the shift from discussion of situation which are possible but do not occur in practice due to some reason to recognition of real phenomena of interest. ... We suggest to consider computer viruses as this new specific form of life which is coming in the contact with our form of life. ... Computer life has been created by human being, the role of independent evolution of computer viruses seems to be still negligible. ...

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• http://lnfm1.sai.msu.ru/~victor/eng/liter/index.htm
• Natural Satellites Data Center. Objectiv.

The original files with the data were in different formats. ... Such files were named "standard data files" and linked to the database. They can be easily transformed to any desirable format by a code. Here we present two simple computer programs of this kind. ... When running the code, you can specify columns in the output file: wavelength, energy (eV) or wavenumber (cm -1 ) as the first column, and complex refractive index or dielectric function as the second and third columns. ...

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• Course of Non-numerical Programming
• Textbook on Computer technology for pupils
• AI SPbU library of scattering codes

... Chapman, R. and Brandt, J.: The Comet Book: A Guide for the Return of Halleys Comet (1984, Jones and Bartlett) ? ... Branley, F.: Comets (1984, T.Y. Crowell) ? good picture book for students in grades K-3. ... Schatz, D.: The Comet Cometh: An Activity Book for the Return of Comet Halley ? ... Glenn, W.: "Halley's Comet Makes a Comeback'' in The Science Teacher Jan. 1984, p. 38. ... To construct a model of an Alien Being that could exist on another planet or satellite in our solar system. ...

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• ASP: Annual Reports
• ASP: National Astronomy Education Projects
• ASP: Mercury Magazine

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Next: Third: Create a session Up: Starting up correlator control Previous: First: Log on to б  Contents . Both the correlator interface and the correlator spectra display program are run from lbaccc . ... lbaccc . ... A more complete explanation of SPD, including available commands, is found in Appendix C. Next: Third: Create a session Up: Starting up correlator control Previous: First: Log on to б  Contents . ...

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• Downloading Duchamp
• The Karma Homepage
• VSOP Observing Schedule

... The technology needed to implement a Distributed Astronomical Data Archive (DADA) is available today (e.g., Fullton 1993). Query interface standards are needed, however, before the DADA information will be discoverable. ... These parameters would be used to index each dataset in each catalog. ... The technology is available today to perform cross-catalog queries, to fetch the data at the click of a mouse, quickly to add new observation catalogs, and to distribute the load across multiple machines. ...

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• The Grid Signal Processing System
• FITSIO Subroutine Library Update
• Real-Time Linux Driving a Spectrometer

... Software requirements . ... SAOImage DS9 is an astronomical imaging and data visualization application used by SAS . ds9 latest stable version 4.12 works fine with SAS 7.1.0 . ... We recommend the installation of HEASOFT version 6.0 (HEADAS) or later, since SAS 7.1.0 was built with that version (except for Mac OS X where version 5.3 was used). ... To work with this release of SAS on any Mac OS X version, the X Windows software or X11 (a.k.a X11R6) for Mac Os X must be installed . ...

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• Description

... Fortunately, astronomy is an exception in this regard. ... As commercial databases have been described in detail before (see e.g. Watson 1991), this chapter will concentrate on Library information services that require neither an account nor a password and do not charge fees according to the connecting time or the number of data sets that are displayed or downloaded. ... American Astronomical Society (AAS) . Astronomical Observatory Trieste (OAT) library . ... Center for Astrophysics library . ...

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• Lars Lindberg Christensen - Homepage
• Earth orientation updates
• ESO Web file formats and associated viewers

... To introduce you to the Python programming language, and its Visual module (VPython), which allows 3D simulation. The computer labs are held in room BOZO 112, not in the usual physics lab. ... This lab will use the Python programming language. ... Click on the Windows button in the bottom left, select "Programs", then the "A-Z" list of programs. ... Later in the course you will need to write your own VPython programs for assessment - this lab is your chance to make sure you can do this. ...

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• Observational Techniques: Computer Notes
• Computer room
• Workshops and computer labs

CIMA is more than just the observing tool - in fact, the observing tool is just a part of a bigger package called the CIMA software package. ... There is also a another package called the CIMA WAPP software which contains the WAPP software, the special Tcl/Tk interpreter used by CIMA and support libraries. ... All CIMA software components recognize the following general options that are part of the CIMA version selection system: . ... The select_cima script can be used to set up a default version. ...

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• A Quick Look
• Technical Data for the Arecibo Airglow and Optical Instrumentation
• The Arecibo User Manual for Astronomers

... The user database is traditionally contained in the /etc/passwd љ file. Some systems use shadow passwords , and have moved the passwords to /etc/shadow љ . ... However, installing shadow passwords later onto a system that did not support them can be difficult. ... The crack љ program can be used to crack passwords; any password it can find is by definition not a good one. ... The user group database is kept in /etc/group љ ; for systems with shadow passwords, there can be a /etc/shadow.group љ . ...

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• Atomic Physics
• WWW Links.....
• Computer Systems

Next: The course and unit level Up: Ceilidh - On Line C Tutoring System Previous: Introduction . ... To enter the system at the general level, the appropriate command (which should have been set up by your computer systems administrator) is . ... q quit this session fs find student | ... text ceilidh only) in X the courses available appear on main window.This command tells you which courses are available and supported by the Ceilidh system, their full title and their abbreviation. vp . ...

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• From Power Up To Bash Prompt: Hardware
• From Power Up To Bash Prompt: The GNU C Library
• Linux I/O port programming mini-HOWTO: Hints

... Dr. Ravil Nazirov is the head of the workshop, and Andrew Ananjev is the secretary of the workshop. ... The workshop is used to be held in the last decade of the month, preferably on Tuesdays. ... The next session will take place October 29, 1996 . ... There is "CONPAS" mailing list which you can join to discuss issues of problem solving and to be automatically notified of important dates and decisions with respect to the coming sessions. ... Secretary of the Workshop: Andrew Ananjev . ...

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• Geomagnetic Indices Kp, ap, Ap, Cp and C9
• Asteroid Castalia
• Parallax