building station metadata with pdcc
DESCRIPTION
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 Network datalesses no longer required.TRANSCRIPT
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)