Building Station Metadata with PDCC

Building Station Metadatawith PDCC

Dr. Mary TempletonIRIS Data Management Center

Managing Data from Seismic NetworksSeptember 9-17 2015

Hanoi, Vietnam

Why is Metadata Important? To use data, you need to know where and how it

was recorded: x,y,z,t How do you translate the time series to ground motion?

Direction of motion recorded Amplitude scaling Phase shifting

The data format must be understood Metadata is easiest to record before it’s forgotten

PDCC(Portable Data Collection Center)

Software that helps you create Dataless SEED – a well-understood exchange format for metadata

PDCC can also be used as an editor to update

dataless SEED as metadata changes

Downloading PDCC from the Web

Click

Downloading PDCC

Fill out the “software request” form

Download the latest .zip file Unzip the file by double-clicking it or type

unzip pdcc-3.8-pl2.zip

Click

Running PDCC

java (-Xmx512m –Xms512m) –jar run_pdcc.jar -X arguments are optional:

-Xmx512m increases Java’s heap space -Xms512m increases Java’s stack space

Steps for Building Metadata

Register your network and station names Create a dataless SEED volume Enter network information Enter information for a single station Add additional stations using the first as a

“clone”

Create a Dataless SEED Volume

Select Dataless SEEDClick Create New

Enter a Dataless name

Enter Network & Station Information

Select Build a Station and Launch it

Enter your ISC-registered station name and FDSN-registered network code

Click thedataless name

Enter Station Information

The PDCC Station Wizard will display similar windows for Metadata epoch start and end times Station location

Enter Station Information

Include Instrument responses using the NRL Tool

Click Go

Enter Station Information

NRL Tool asks you questions about your sensor and datalogger to find the correct nominal response

Enter Station Information The next 3 windows ask you

Whether your sensor is low or high gain Your sensor channels’ dips and azimuths

The sample rate of your current channel

You can Add channel orientations using the pulldown menu, then edit the values if needed

Enter Station Information

Click Finish to write channels with this sample rate to your dataless

Enter Station Information

To add additional channels (including other sample rates)

Select a channel from your new station

Copy and Paste it Select the new channel

Enter Station Information

Edit channel information as needed

Choose Select Instrumentation and Launch it to update the instrument response from the NRL

Enter Station Information

To add additional epochs for the same channel, repeat the Copy and Paste steps Edit the start and end times Edit any additional information that changed Be sure the previous epoch end time is closed

Save Your Dataless

Select your dataless name, then click Save as…

The Result So Far

A Dataless SEED volume containing Network information Description of a single station

All channels All epochs

(also called a Station Dataless)

Next Goal

A Dataless SEED volume containing Network information Description of all stations in the network(also called a Network Dataless)