How to use loadLIGOData

loadLIGOData is a GUI to load data from NDS server to your Matlab workspace. Once the data is loaded, you can do whatever you want to the data with the power of Matlab. Or you can quickly plot the data using another GUI called plotLigoData.

Running loadLIGOData

At the 40m, loadLIGOData is installed in /cvs/cds/caltech/apps/loadLIGOData/. You have to add this directory and the sub-directories to your Matlab path, like

addpath(genpath('/cvs/cds/caltech/apps/loadLIGOData'));

Then just run loadLIGOData from the Matlab command line.

Alternative way to invoke it is to type loadLIGOData in the command line of a linux terminal. There is a wrapper script of that name which starts up a Matlab and executes loadLIGOData.

On allegra and rosalba, there is an icon to run loadLIGOData on the desktop.

Basic Usage

The loadLIGOData screen looks like this.

attachment:loadLIGOData.png

First select a site from the drop down menu at the top left. Then click the "Load channels" button. A channel list is loaded to the left list box. You can navigate through the list like a file directory browser. Add channels to the right list box by clicking "->" button. You can remove selected channels by "<-" button.

After channels you want to download are selected, put a trigger time in the "trigger time" field. The trigger time format is the one tconvert understands. Run tconvert without argument on a controls computer to see the help message. By clicking "Now" button, you can update the "trigger time" field to the current time.