The Norwegian Seismic Array (NORSAR)
Abstract
This report describes the operation and research activities at the Norwegian Seismic Array (NORSAR) for the period from 1 October 1979 to 31 March 1980. There has been a significant decrease in the performance of the NORSAR online DP system compared with the previous reporting period with average uptime of 83.7% compared to 95.5%. The average daily number of events is 8.9. The array communications performance has been fair in the reporting period. Towards the end of the period 01B was used for testing of the Modcomp computer and disconnected from the Special Processing System (SPS) during the test periods. Also ARPA network communication has been satisfactory. Six institutions are now connected to the network via the NORSAR Terminal Interface Message Processor (TIP). In October 1979 an experimental small-aperture subarray (NORESS) was set in operation in the 06C area, at first substituting the 06C short period (SP) data, and from 27 March substituting 01B Sp data. Horizontal SP seismometers were set in operation in the Long Period Vault of 06C 27 March 1980. The work with Modcomp-SPS substitution has continued during the period, and a satisfactory completion is expected in the near future. A study on a possible future computer upgrade at NORSAR has been conducted. This includes improvements specially of the detection processor and would require a modern high-capacity computer like the IBM 4341.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1980
- Accession Number
- ADA112152
Entities
People
- Alf K. Nilsen
Organizations
- Royal Norwegian Council for Scientific and Industrial Research