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2002 UNAVCO Highlights
Title Date
Alaskan Magnitude 7.9 Denali fault earthquake of November 3, 2002 The magnitude 7.9 Denali fault earthquake of November 3, 2002 resulted from right-lateral offset along portions of the Denali and Totschunda fault systems in Alaska. Total length of the rupture was at least 300 km (190 miles).
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2002-11
Sierra Negra L1/L2 GPS Network Jointly funded by the National Science Foundation - EAR and NASA - SENH, this project is a collaboration between the University of Idaho, Darwin Research Station, Galapagos National Park, and UNAVCO. The project is unique for several reasons. First of all, data from two different receiver types are being streamed via 900 MHz spread spectrum transceivers using the TDMA (Time Division Multiple Access) protocol.
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2002-03
Akutan Alaska The purpose of this project was to install 4 monitoring stations with GPS, seismic, and borehole strainmeter equipment. The installation occurred in several phases. The UNAVCO engineer's role was to provide training on the fabrication and installation of the short-braced monument as well as general support. Ben Pauk was the engineer's primary contact and trainee. The data from the new sites will be telemetered to an FAA satellite uplink in Dutch Harbor and make its way to Anchorage. Currently there are only three stations installed collecting GPS data.
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2002-08
Joint IRIS/PASSCAL/UNAVCO Site Work Phase 1 included installation of a deeply anchored GPS monument at the IRIS/PASSCAL Facility (PAS1), installation of an Ashtech MicroZ GPS receiver with data being downloaded to a computer over a wireless FreeWave radio link. The computer is running RedHat Linux 7.1 and using EGADS and SHARC to configure and download the GPS receiver. LDM (Local Data Manager) was used to transfer the data back to the UNAVCO Facility for processing and archiving.
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2002-12
Saudi Arabia In addition to providing network support to existing stations in Turkey, Egypt, Morocco, Ukraine, and Armenia, UNAVCO field engineers installed new stations in Sauid Arabia, Lebanon, Syria, and Morocco. GGN stations receive back-up downloading and the data from the remainder of the stations are managed by UNAVCO and are archived at the Facility. Data from selected stations are pushed to NASA Goddard CDDIS.
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2002-11
Friday Harbor SuomiNet Installation The UNAVCO Facility support to the SuomiNet project includes system development, integration, deployment, and technical support for the 75 station continuous GPS network. This effort was supported with NSF-Atmospheric Sciences Division (ATM) funding, and is benefiting both the atmospheric and geodetic research communities. The design and development included developing specific GPS technical capabilities to meet the unique real-time data streaming needs of the system.
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2002-11
Denali Earthquake Emergency Response The UNAVCO Facility has completed an initial emergency response to the November 3 magnitude 7.9 earthquake on the Denali Fault in the Alaska Range. Four campaign receivers from the UNAVCO pool were deployed by University of Alaska, Fairbanks (Jeff Freymueller, PI) staff two days after the quake. A UNAVCO field team also installed 10 semi-permanent continuous stations during the first two weeks after the earthquake.
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2002-11
Isla Guadalupe SCIGN, UNAVCO and CICESE have collaborated to install a permanent GPS station and VSAT satellite communications system on Isla Guadalupe. VSAT is the only viable alternative for real time data communications with the island which lies too far from the mainland of the Baja Peninsula to allow regular radio telecommunications methods.
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2002-04
Joint IRIS/PASSCAL/UNAVCO Seismic & GPS Installations, Testing, and Development Phase 2 included the installation of a serial to Ethernet device which was put in place of the FreeWave radio link. The download software (SHARC) needed to be modified in order to accomodate a longer time-out period, thus allowing for the entire data file to be transferred to the download computer before timing out.
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2002
Joint IRIS/PASSCAL/UNAVCO Seismic & GPS Installations, Testing, and Development Phase 3 included the installation of a Very Small Aperture Terminal (VSAT) system for communications, along with integration of a Nanometrics Trillium Broadband seismometer and a 24 bit Trident Digitiser. A seismic vault was excavated in order to house the new instruments. The same Ashtech MicroZ receiver was used for GPS data collection.
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2002
 

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