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Import.
| author | Daniele Nicolodi <nicolodi@science.unitn.it> |
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| date | Wed, 23 Nov 2011 19:22:13 +0100 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/m-toolbox/html_help/help/ug/ltpda_training_intro.html Wed Nov 23 19:22:13 2011 +0100 @@ -0,0 +1,151 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" + "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd"> + +<html lang="en"> +<head> + <meta name="generator" content= + "HTML Tidy for Mac OS X (vers 1st December 2004), see www.w3.org"> + <meta http-equiv="Content-Type" content= + "text/html; charset=us-ascii"> + + <title>LTPDA Training Session 1 (LTPDA Toolbox)</title> + <link rel="stylesheet" href="docstyle.css" type="text/css"> + <meta name="generator" content="DocBook XSL Stylesheets V1.52.2"> + <meta name="description" content= + "Presents an overview of the features, system requirements, and starting the toolbox."> + </head> + +<body> + <a name="top_of_page" id="top_of_page"></a> + + <p style="font-size:1px;"> </p> + + <table class="nav" summary="Navigation aid" border="0" width= + "100%" cellpadding="0" cellspacing="0"> + <tr> + <td valign="baseline"><b>LTPDA Toolbox</b></td><td><a href="../helptoc.html">contents</a></td> + + <td valign="baseline" align="right"><a href= + "bycategory.html"><img src="b_prev.gif" border="0" align= + "bottom" alt="Functions - By Category"></a> <a href= + "ltpda_training_topic_1.html"><img src="b_next.gif" border="0" align= + "bottom" alt="Topic 1 - The basics of LTPDA"></a></td> + </tr> + </table> + + <h1 class="title"><a name="f3-12899" id="f3-12899"></a>LTPDA Training Session 1</h1> + <hr> + + <p> + <p> + This series of help pages consitute the first training session of LTPDA. The various data-packs used throughout + the tutorials are available for download on the <a href="http://www.lisa.aei-hannover.de/ltpda/training_sessions/training_session_1/training_session_1.html">LTPDA web-site</a>. +</p> +<ol> + <li><a href="ltpda_training_topic_1.html">Topic 1 - The basics of LTPDA</a></li> + <li><a href="ltpda_training_topic_2.html">Topic 2 - Pre-processing of data</a></li> + <li><a href="ltpda_training_topic_3.html">Topic 3 - Spectral Analysis</a></li> + <li><a href="ltpda_training_topic_4.html">Topic 4 - Transfer function models and digital filtering</a></li> + <li><a href="ltpda_training_topic_5.html">Topic 5 - Model fitting</a></li> +</ol> +<p> + In addition, throughout the course of this training session, we will perform a full analysis + of some lab data. The inputs to the analysis are two time-series data streams, + the first is the recorded output of an interferometer, the second is a recording + of the room temperature in the vicinity of the interferometer. Both are recorded with + different sample rates and on different sampling grids. The temperature data is unevenly + sampled, and may evem have missing samples. +</p> +<p> + During each topic of the training session, the data will be manipulated using + the tools introduced in that topic (and previous topics). The aim of the data + analysis is to determine the influence of temperature on the interferometer + output. In particular the steps will be: +</p> +<ol> + <li><a href="ltpda_training_topic_1.html">Topic 1</a> + Loading and calibrating the raw data. + <ol> + <li>Read in the raw data files and convert them to AOs</li> + <li>Plot the two data streams</li> + <li>Calibrate the interferometer output to meters (from radians)</li> + <li>Calibrate the temperature data to degrees Kelvin from degrees Celcius</li> + <li>Save the calibrated data series to XML files, ready for the input to the next topic</li> + </ol> + </li> + <li><a href="ltpda_training_topic_2.html">Topic 2</a> + Pre-processing and data conditioning. + <ol> + <li>Read in the calibrated AOs from XML files</li> + <li>Trim the data streams to the same time segments</li> + <li>Resample the temperature on to an even sampling grid with no missing samples</li> + <li>Resample to the two data streams to a common 1Hz sample rate</li> + <li>Interpolate the two data streams on to the same time grid</li> + <li>Save the cleaned data to AO XML files</li> + </ol> + </li> + <li><a href="ltpda_training_topic_3.html">Topic 3</a> + Spectral analysis. + <ol> + <li>Load the time-series data from Topics 1 and 2</li> + <li>Compare PSDs of the time-series data before and after pre-processing</li> + <li>Check the coherence of temperature and IFO output before and after pre-processing</li> + <li>Measure the transfer function from temperature to IFO output</li> + <li>Save the measured transfer function to disk as an AO XML file</li> + </ol> + </li> + <li><a href="ltpda_training_topic_4.html">Topic 4</a> + Simulation of the system under investigation. + <ol> + <li>Make approximate noise-shape models for the temperature and IFO displacement input spectra</li> + <li>Make digital IIR filters matching these noise-shape models</li> + <li>Filter white-noise data streams to produce simulated versions of the temperature and IFO inputs</li> + <li>Make a model of the temperature to IFO coupling</li> + <li>Construct a filter representing this coupling</li> + <li>Filter the simulated temperature data and add it to the simulated IFO input data</li> + <li>Save the simulated temperature and the simulated IFO output data to disk</li> + <li>Repeat the steps from Topic 3, this time using the simulated data</li> + </ol> + </li> + <li><a href="ltpda_training_topic_5.html">Topic 5</a> + Model fitting and system identification. + <ol> + <li>Load the measured transfer function from the end of Topic 3</li> + <li>Fit a model transfer function to this measurement</li> + <li>Make a digital filter representation of the fitted model</li> + <li>Filter the temperature data with this filter</li> + <li>Compare the PSD of the filtered temperature data and the IFO output</li> + <li>Subtract the filtered temperature data from the IFO output</li> + <li>Compare the IFO data with the temperature influence subtracted to the original IFO output</li> + <li>(Time permitting) Repeat the exercise for the simulated from Topic 4</li> + <li>(Still need something to do?) Repeat the steps of Topic 4 but this time fit a model to the measured + temperature data and use a noise generator to make a simulated temperature data stream</li> + </ol> + </li> +</ol> + </p> + + <br> + <br> + <table class="nav" summary="Navigation aid" border="0" width= + "100%" cellpadding="0" cellspacing="0"> + <tr valign="top"> + <td align="left" width="20"><a href="bycategory.html"><img src= + "b_prev.gif" border="0" align="bottom" alt= + "Functions - By Category"></a> </td> + + <td align="left">Functions - By Category</td> + + <td> </td> + + <td align="right">Topic 1 - The basics of LTPDA</td> + + <td align="right" width="20"><a href= + "ltpda_training_topic_1.html"><img src="b_next.gif" border="0" align= + "bottom" alt="Topic 1 - The basics of LTPDA"></a></td> + </tr> + </table><br> + + <p class="copy">©LTP Team</p> +</body> +</html>