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DMT Monitors: Beyond the FOM

John Zweizig

LIGO/Caltech

LLO

August 18, 2006

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Everyone Knows About the FOMs

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Other Things Aren't So Obvious

How do I know what's running? What kinds of data are the monitors producing? Where are the output data located? How do I use them? Can I use DMT to look at new things?

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Overview

DMT Online» data products» Spi Page» Getting the data

Running existing monitors.» Setting up the environment» Making a PSLmon configuration» Running offline (or online at LHO?)

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DMT Data Products

Online DMT viewer objects» dmtviewer (FOMs)» webview

Trends» Everything you see on the FOMs and a lot more are recorded as

trends» 1/minute statistical summary (mean, max, min, n, rms)

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DMT Data Products

Status reports» Monitor specific status and configuration info (not standardized)» May contain plots, statistics, channel names, etc.

Triggers» Time stamps of interesting events (transients, state changes,

readout errors, range overflows, etc)» Lots of metadata to describe transient tim, frequency, etc.

Alarms» flag abnormal run states, failures

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Spi Page

Trigger statistics

Recent triggers

Alarms

Monitor docsStatus report

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Viewing Online Data Objects

webview» Standard browser accessible plots» http://stone.ligo-wa.caltech.edu:9991/monitors.html

dmtviewer» Must install dmtviewer from e.g. ligotools» DMTWEBSERVER=stone.ligo-wa.caltech.edu:9991/LHO,delaronde.ligola.caltech.edu:9991/LLO

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webview: Select Monitor

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webview: Select plot

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webview: et voila

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Trend Storage/Retrieval

DMT Trend archive directory structure» Online directories: /dmt/<monitor>/H-M-<gps>

» Archive: /archive/frames/dmt/LLO/<monitor>/H-M-<gps>

» Trend writer class writes to $DMTRENDOUT/. Read/process/plot trends like any frame (matlab, root/DMT, etc)

or dump with trendtable. Plot trends from control room with dv.

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dv: Channel Selection

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dv: Make Plot

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dv: Plots

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Triggers

Trigger Indicate properties of transient events» Name, subtype» Time: Start, maximum, duration» Frequency: Center, bandwidth, peak

Trigger archival» Triggers generated by monitors, are sent to TrigMgr (and then

SeqInsert) to be stored in database

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Retrieve Triggers with Guild

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Guild Results

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Running a Monitor

Trigger output

Monitor report

Trend output directory

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PSLmon

Originally written to look at PSL properties (the only subsystem working at the time)

Doc: http://www.ligo.caltech.edu/~jzweizig/dmt/Monitors/PSLmon

Now – A general purpose set of tools» Band limited RMS (fourier domain)» Glitch finding» Spectra» Coherence (not used/tested/supported)

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Configuration File

Shell command like syntax. Configuration commands

» Parameter: Set a run-time parameter

» Channel: define a channel to be processed

» Filter: Define filters

» Band: Create a band-limired RMS tool

» Glitch: Create a glitch tool

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Design a Filter

Use foton or root to specify a filter and Look at the Bode plot Check out the time domain response in root

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Filter design in Root

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Filter Bode Plot

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Time Domain Response

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Create a PSLmon Configuration

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Running on Bermuda

Script

Configuration

Monitor report files

Trend files

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Dump Trend Channel Names

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Look at Trends