Intelligent Array System
Abstract
This report presents a detailed description of the major product of this project, a computer hardware/software system called the Intelligent Array System (IAS). The IAS processes data from two high-frequency arrays (NORESS & ARCESS) in Norway to detect, locate and identify seismic events. The IAS computers and functions are distributed between the NORSAR Data Anlaysis Center (NDAC) near Oslo and the Center for Seismic Studies (Center) in Arlington, VA. The IAS modules at NDAC automatically retrieve data from a disk buffer, detect signals, compute signal attributes (amplitude, slowness, azimuth, polarization, etc.), and store them in a commercial relational database management system (DBMS). IAS makes scheduled (e.g., hourly) transfers of the data to separate DBMS at the Center. Arrival of new data automatically initiates a knowledge- based system (KBS) which interprets these data to locate and identify (earthquake, mine blast, etc.) seismic events. This KBS uses general and area- specific seismological knowledge represented in rules and procedures. For each event, unprocessed data segments (e.g., 7 minutes for regional events) are retrieved from NDAC for subsequent display and analyst review. The interactive analysis modules include integrated waveform and map display/manipulation tools for efficient analyst validation or correction of the solutions produced by the automated system. Another KBS compares the analyst and automatic solutions to mark overruled elements of the knowledge base. Performance analysis statistics guide subsequent changes to the knowledge base so it improves with experience.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1990
- Accession Number
- ADA231107
Entities
People
- D. Baumgardt
- J. T. Anderson
- S. R. Bratt
- T. C. Bache
- W. E. Farrell
Organizations
- Leidos