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Important Hardware/Software Notes for Researchers Using PASSCAL Equipment

This page includes important Hardware/Software Notes for Researchers Using PASSCAL Equipment. January 17, 2019: GPS Rollover

Late 2018 PASSCAL learned of a GPS week rollover event that can affect data logger performance and timing. PASSCAL has acquired a GNSS signal generator that can emulate GPS satellite signals. This satellite emulator allows us to test PASSCAL equipment that relies on GPS timing and to determine how equipment will handle the GPS rollover event. To date, we have determined that some models of GPS engines are affected by the rollover. How the rollover errors manifest is dependent on the data logger’s model and firmware version of the GPS engine.

Employment Opportunity at IRIS PASSCAL: Sr. Staff Scientist/Software Group Supervisor

Senior Staff Scientist/Software Group Supervisor

Institution: IRIS PASSCAL
Open Until: filled

JOB DUTIES:
The core responsibility of the IRIS PASSCAL Software Group Supervisor is to direct and oversee software development and distribution. The Group Supervisor is expected to assess both facility and community software needs, scope and design development projects, and evaluate final products to ensure project goals and performance criteria are achieved. The Group Supervisor is expected to establish development standards and infrastructure to ensure a maintainable software package. The Software Group Supervisor is also expected to devote significant time designing, developing, and maintaining software.

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Staff Scientist / Software Engineer

The IRIS PASSCAL Instrument Center at New Mexico Tech is seeking applicants to fill the position of Staff Scientist/Software Engineer. Primary responsibility is to support software engineering projects both in the lab and in the field.

Duties include: The software engineer’s core responsibility is to develop and maintain software that is used on or to facilitate seismological experiments. IRIS PASSCAL software includes tools to: interface with seismic data loggers, test equipment, convert between data formats, analyze state-of-health information, manage inventory and maintenance, and schedule equipment. The software engineer will also be responsible for providing user support to both PASSCAL staff and the IRIS community. The software engineer will have opportunities to conduct training and do seismological fieldwork.

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Employment Opportunity at IRIS PASSCAL: Hardware Specialist

The Incorporated Research Institutions for Seismology Program for Array Studies of the Continental Lithosphere (IRIS PASSCAL) Instrument Center (www.passcal.nmt.edu) at New Mexico Tech is seeking applicants to fill the position of Hardware Specialist.

 

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PASSCAL's PASSOFT Software has been Updated

PASSCAL provides open-source software, PASSOFT, for downloading seismic data from data recorders, for quality assessment, and for conversion to other data formats for analysis and archiving at the IRIS Data Management Center. The latest version of PASSOFT is now available for general use. It is Python 3 compatible, and can be downloaded here.

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2020 Polar Technology Conference coming in March

The 2020 Polar Technology Conference is planned for 10–12 March 2020 in Boulder, Colorado. This activity is a cooperative effort among the National Science Foundation’s Office of Polar Programs, the Arctic Research Consortium of the United States, and the polar research community.

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Ground Penetrating Radar (GPR) System

The IRIS Education and Public Outreach program acquired a Sensors and Software Noggin GPR System with SmartCart configuration to enhance the IRIS PASSCAL equipment pool (see image at left). The system has onboard GPS, data acquisition programming, and preliminary data interpretation capabilities. The system has both line-scan or grid-scan data collection modes. The onboard software allows for quick survey setup, on-the-go viewing of the waveforms collected, and initial waveform depth estimates. Processed onboard data can be visualized as depth versus position along a line, or as a slice view of grid data. The PASSCAL Instrument Center offers additional software for more in-depth post acquisition processing and interpretation of the data.

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Magnetotelluric Systems at PASSCAL

Magnetotelluric (MT) methods are used to produce conductivity models of the crust and upper mantle through the recording of geoelectric and geomagnetic field variations at the Earth's surface. Depending on the period of the recordings, these methods can provide results from a few hundred meters depth (short period) to 30 km or deeper (long period). Conductivity is a physical property, which is complementary to seismic velocity, and which is very sensitive to the presence of fluids. When seismic and MT data sets are measured together, the additional data can dramatically improve determinations of the structure of the crust and mantle.  

GPS Rollover: Potential Data Logger Performance & Timing Issue

Late 2018 PASSCAL learned of a GPS week rollover event that can affect data logger performance and timing. PASSCAL has acquired a GNSS signal generator that can emulate GPS satellite signals. This satellite emulator allows us to test PASSCAL equipment that relies on GPS timing and to determine how equipment will handle the GPS rollover event. To date, we have determined that some models of GPS engines are affected by the rollover. How the rollover errors manifest is dependent on the data logger’s model and firmware version of the GPS engine.

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PASSCAL Announces Software release: Nexus, a simple tool for creating SEED meta-data.

PASSCAL is pleased to announce the release of Nexus, a simple tool for creating SEED meta-data.

Nexus is a software tool with a graphical interface that allows users to quickly and easily create and modify SEED meta-data. It outputs StationXML, the recently adopted replacement format for Dataless SEED. Nexus greatly simplifies preparing data for archival at the DMC. 

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