HR: 16:20h
AN: S34A-01 INVITED     [Abstracts]
TI: Real-time operation of the NSF EarthScope USArray Transportable Array
AU: * Astiz, L
EM: lastiz@ucsd.edu
AF: Scripps Inst. Oceanography - IGPP, University California San Diego 9500 Gillman Dr., La Jolla, CA 92093-0225, United States
AU: Eakins, J A
EM: jeakins@ucsd.edu
AF: Scripps Inst. Oceanography - IGPP, University California San Diego 9500 Gillman Dr., La Jolla, CA 92093-0225, United States
AU: Vernon, F L
EM: flvernon@ucsd.edu
AF: Scripps Inst. Oceanography - IGPP, University California San Diego 9500 Gillman Dr., La Jolla, CA 92093-0225, United States
AU: Martynov, V
EM: lastiz@ucsd.edu
AF: Scripps Inst. Oceanography - IGPP, University California San Diego 9500 Gillman Dr., La Jolla, CA 92093-0225, United States
AU: Newman, R L
EM: rlnewman@ucsd.edu
AF: Scripps Inst. Oceanography - IGPP, University California San Diego 9500 Gillman Dr., La Jolla, CA 92093-0225, United States
AU: Cox, T A
EM: lastiz@ucsd.edu
AF: Scripps Inst. Oceanography - IGPP, University California San Diego 9500 Gillman Dr., La Jolla, CA 92093-0225, United States
AU: Mulder, T L
EM: lastiz@ucsd.edu
AF: Scripps Inst. Oceanography - IGPP, University California San Diego 9500 Gillman Dr., La Jolla, CA 92093-0225, United States
AU: Busby, R W
EM: busby@iris.edu
AF: IRIS - USArray, 37 Haynes Avenue, Falmouth, MA 02540-2312, United States
AB: The Transportable Array (TA) component of USArray uses real-time telemetry to send data to the Array Network Facility (ANF) through a variety of satellite, mobile phone, wireless and wired communication links. The ANF is responsible for the timely delivery of metadata and waveform data to the IRIS DMC from the growing number of Transportable Array stations. The IRIS DMC makes these data available to the research community. The network has increased in size to 327 stations with 259 out of the 400 new TA sites installed (as of 28 February 2007). Starting in Fall 2007, equipment will start to roll from current stations to new locations to the east of the current footprint. Use of the Antelope software package has allowed the ANF to maintain and operate this extremely dynamic network configuration, facilitating the collection and transfer of data, the generation and merging of the metadata as well as the real-time monitoring of state of health of TA station data-loggers and their command and control. Four regional networks (ANZA, BDSN, SCSN, and UNR) as well as the USNSN contribute data to the Transportable Array in real-time. Although the real-time data flow to the IRIS DMC has been 93.4% over the last year, the ANF and the TA field teams have extended every effort and have managed to recover an additional 4.8% by recovering data from the local data storage device (Baler 14) at each station. Once the missing data is recovered, we then generate station-channel-day volume seed files, which are resent to the DMC to bring the total data recovery rate to 98.4%. The total network uptime is above 99%. Analyst review of automatic locations for the USArray network is being done at the ANF as part of the data quality monitoring strategy. All events are associated with the USGS and regional network bulletins. As of February 2007, around 13,000 weekly picks are being fully reviewed by analysts at the ANF and over 19,000 events have been recorded. We find a small percentage (about 10 %) of events that cannot be associated with existing bulletins. This information is used by the regional network operators to help them determine which TA stations may be beneficial to permanently add to their seismic networks. Operation of the USArray at the ANF has benefited by the real-time interface with the ORB and the Datascope database using PHP for display on the ANF website (http:anf.ucsd.edu) to provide station and system state-of- health information to field teams. Information available for all stations includes: location, maps, photographs, equipment deployed, communications, distribution of events recorded by each station, and displays of daily, weekly, and yearly state of health parameters as well as station noise spectra generated by the DMC.
DE: 0935 Seismic methods (3025, 7294)
DE: 3294 Instruments and techniques
DE: 3299 General or miscellaneous
DE: 7290 Computational seismology
DE: 7294 Seismic instruments and networks (0935, 3025)
SC: Seismology [S]
MN: 2007 Joint Assembly