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Here are some of the articles that have been recently posted to the PASSCAL website:

Grounding when Static is a Problem

Grounding of remotely-powered stations (not AC-powered), for stations where static charge is a problem.

This note concerns only those stations utilizing a remote autonomous power system and solar panels. Systems that will be using AC power should contact the PIC staff for more information on safely using these types of power sources.

Grounding of DAS units should only be attempted in extreme cases where static charge is a problem (for example, failing equipment such as external GPSes). Attempts to ground DAS units can lead to ground loops if not properly done, or even if done to best practices!  It should only be attempted when the sensor itself has been isolated from ground by a non-conducting plate such as a tile or phenolic pad.  Pads which are not part of the original vault design can also cause stability/noise problems, and must be well coupled to the base of the vault or concrete.

10/09/2013
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EPIC SEG-Y Trace Header

 EPIC SEG-Y utilizes big endian byte order and sets the various trace headers as outlined below.

 

EPIC SEG-Y Trace Header

 

10/01/2013
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Freshman Senator Visits EarthScope/EPIC

On Friday, February 22nd, New Mexico's newest member of the United States Senate, Martin Heinrich, paid a visit to New Mexico Tech, and the EarthScope/EPIC. Senator Heinrich, who won his seat in the 2012 general election, is a strong advocate for Science, Technology, Engineering, and Mathematics (STEM) Education, and is the only engineer currently serving in the senate.

Senator Heinrich was given an overview of activities at the school by New Mexico Tech President Dr. Dan Lopez, and also toured the Mechanical Engineering Department.  Dr. Rick Aster escorted Sen. Heinrich on a tour of the EPIC, the world’s largest and the nation’s flagship federally-funded lending library of seismology equipment.

09/17/2013
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PH5: Why Another Archival Data Format?

 

           

       The impetus to provide a new data format for archiving stems from the inherent limitations with respect to the use of SEG-Y as a data archiving format, limitations such as: requiring vetted meta-data prior to converting the data into SEG-Y files, un-editable meta-data within the file, and inflexible, static data gathers.

09/16/2013
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Hold on a minute... I want my data in SEG-Y format

 

All data requests of PH5 format data sets are fulfilled as either SEG-Y or EPIC SEG-Y.

 

09/16/2013
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Differences between Flexible Array and EPIC Experiment when archiving

For Flexible Array experiments, the Data Group at EarthScope/EPIC shares responsabilities with the Principal Investigator(s) for the archiving of their data as with EPIC experiments, however instead of the fully processed data in the required format (seed or hdf5) and dataless provided by PI on a EPIC Experiment, The PI and his team in a Flexible Array submit all the raw data and information needed to generate the metadata at EPIC.

09/16/2013
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RT130 SEED Data Archiving Flow

09/16/2013
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RT-125 (Texan) SEED Data Archiving Flow

 

09/16/2013
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Q330S Data Archiving Flow

 

09/16/2013
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Q330 Data Archiving Flow

09/16/2013
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EarthScope Primary Instrument Center
New Mexico Tech
100 East Road, Socorro, NM 87801