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Introduction to ligo_viewer

This document provides an overview of the LIGO Viewer tool, highlighting its capabilities and installation steps. The latest version of LIGO Viewer allows users to display trend data from multiple channels on various graphs, supports Windows and Linux/Unix systems, and can retrieve and save data locally in CSV format. The tool features a user-friendly interface for accessing NDS proxies and offers functionalities like SSH tunneling and Postscript plot generation. Instructions for installation and usage from source are outlined to assist users.

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Introduction to ligo_viewer

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  1. Vladimir Dergachev (University of Michigan) Introduction to ligo_viewer DetChar camp, Hanford 20-22 August 2004 DCC: G040420-00-Z

  2. LIGO viewer

  3. Capabilities of latest version • Displays trend data from any available channels on multiple graphs • Linux/Unix and Windows versions available • Works from any computer that can access NDS proxies • Linux/Unix version is able to use SSH to tunnel to any computer with tclsh that has access to NDS proxy • Can retrieve data and save it locally in CSV format • Can produce Postscript plots • Can save plot settings for future reference

  4. Installation • LIGOtools binaries available from http://www.ldas-sw.ligo.caltech.edu/ligotools/ • Source and Windows versions do not require LIGOtools. Available athttp://volodya-project.sourceforge.net/ligo_viewer.php • README file describes how to setup SSH tunnel • Linux/Unix source version can be run right after compilation by typing ./ligo_viewer.no_install • To install Windows version simply unpack the tarball in any directory

  5. Source installation • Make sure a version of Tcl/Tk is installed – should be standard with most distributions • Download source tarball (e.g. ligo_viewer-0.5.0b.tar.gz) to your Linux/Unix workstation. • Unpack: tar zxvf ligo_viewer-0.5.0b.tar.gz • Enter directory: cd ligo_viewer-0.5.0/ • Run configure: ./configure • Run make: make • Test compilation:./ligo_viewer.no_install • (Optional) install as root:sudo make install

  6. Choose NDS proxy to select between LHO and LLO Main window Click connect to access proxy • General control • Diagnostics Progress indicator – blue means busy

  7. Channel viewer window Enter time Type filter to select subset of all channels Click to add plot Click to save data

  8. Data viewer window Press and drag to zoom Right-click for menu Use buttons to arrange multiple plots

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