HR: 12:00h
AN: U21B-07 INVITED     [PDF]
TI: A Virtual Geophysical Network: Using Industry Standard Technology to Link Geographically Distributed Sensors and Data Centers
AU: * Ahern, T K
EM: tim@iris.washington.edu
AF: IRIS DMC, 1408 NE 45th Street #201, Seattle, WA 98105 United States
AU: Benson, R B
EM: rick@iris.washington.edu
AF: IRIS DMC, 1408 NE 45th Street #201, Seattle, WA 98105 United States
AU: Crotwell, H P
EM: crotwell@seis.sc.edu
AF: University of South Carolina, Dept. of Geological Sciences 701 Sumter Street, Columbia, SC 29208 United States
AB: The IRIS Data Management System has long supported distributed data centers as a method of providing scientific researchers access to data from seismological networks around the world. For nearly a decade, the NetDC system used email as the method through which users could access data centers located around the globe in a seamless fashion. More recently the IRIS DMC has partnered with the University of South Carolina to develop a new method through which a virtual data center can be created. The Common Object Request Broker Architecture (CORBA) technology is an industry standard distributed computing architecture. Traditionally used by major corporations, IRIS has developed a Data Handling Interface (DHI) system that is capable of connecting services at participating data centers (servers) to applications running on end-users computing platforms (clients). For seismology we have identified three services. 1) A network service that provides information about geophysical observatories around the world such as where the sensors exist, what types of information are recorded on the sensors, and calibration information that allows proper use of the data, 2) an event service that allows applications to access information about earthquakes and seismological events and 3) waveform services that allow users to gain access to seismograms or time series data from other geophysical sensors. Seismological Data Centers operate the servers thereby allowing a variety of client applications to directly access the information at these data centers. Currently IRIS, the U. of South Carolina, UC Berkeley, and a European Data Center (ORFEUS) have been involved in the DHI project. This talk will highlight some of the DHI enabled clients that allow geophysical information to be directly transferred to the clients. Since the data center servers appear with the same interface specification (Interface Definition Language) a client that can talk to one DHI server can talk to any DHI enabled server. This ability allows one to construct a virtual network of data centers giving one the illusion of a single virtual observatory. Some of the features that will be discussed include direct connections to MatLab and the ability to access globally distributed sensor data in real time.
UR: http://www.iris.washington.edu/DHI
DE: 7200 SEISMOLOGY
DE: 7294 Instruments and techniques
DE: 7299 General or miscellaneous
SC: U
MN: 2003 Fall Meeting