High-Rate Real-Time Gnss Installation and Data Acquisition at the Alaska Earthquake Center
Description:
Global Navigation Satellite System(GNSS) is an increasingly integral part of assessing rare, but large, earthquakes. Geodetic capabilities provide an extra layer of scientific investigation which is not only prerequisite to earthquake early warning (EEW) in Alaska, but also provide a better understanding of the ongoing seismic activity in the region. To date, we have upgraded 7 seismic sites across Alaska to include GNSS receivers and have developed a framework for acquiring and archiving this data at the Alaska Earthquake Center (AEC). As part of this integration, we’ve had to navigate the entire process of adapting an additional technology, including site selection, installation, reliable communications back to our datacenter, acquiring the data, and building a preliminary quality control procedure. GNSS receivers are installed at existing seismic monitoring stations that are capable of supporting remote, real-time data acquisition using the same power and communication systems. Recent GNSS installations consist of a VeraChoke antenna with a Septentrio PolarRx5 receiver. The VeraChoke antennas are mounted on polar masts, which are anchored to a solid rock surface. We are using two applications provided by BKG (Bundesamt für Kartographie und Geodäsie) to acquire GNSS data: an NTRIP caster and client. Each receiver is configured to broadcast real-time data to an NTRIP caster, which serves as an accessible connection point for a user to access the GNSS data streams. The NTRIP client accesses the broadcasts by connecting to the caster, then saving the data streams to RINEX files. AEC collects 1 Hz observational data and stores it into 1 hour files. These recent installations and the workflows we built have allowed us to develop skills in field installation, data acquisition, data management, and quality control, hopefully paving the way for more effective and expansive GNSS applications in the coming years.
Session: End-to-End Advancements in Earthquake Early Warning Systems -IV
Type: Oral
Date: 5/3/2024
Presentation Time: 10:30 AM (local time)
Presenting Author: Gabrielle
Student Presenter: No
Invited Presentation:
Authors
Gabrielle Paris Presenting Author Corresponding Author gmparis@alaska.edu University of Alaska Fairbanks |
Stephen Holtkamp sgholtkamp@alaska.edu University of Alaska Fairbanks |
Shah Khan sfkhan@alaska.edu University of Alaska Fairbanks |
Luke Underwood lbunderwood@alaska.edu University of Alaska Fairbanks |
Alexandra Farrell akfarrell@alaska.edu University of Alaska Fairbanks |
Ronni Grapenthin rgrapenthin@alaska.edu University of Alaska Fairbanks |
Nate Murphy nwmurphy@alaska.edu University of Alaska Fairbanks |
Michael West mewest@alaska.edu University of Alaska Fairbanks |
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High-Rate Real-Time Gnss Installation and Data Acquisition at the Alaska Earthquake Center
Category
End-to-End Advancements in Earthquake Early Warning Systems