Improved Seismic Quality Control and Display on R/V EWING

该合同为R/V EWING上改进的地震质量控制和显示系统提供了资金，EWING是一艘208英尺长的船，由LDEO拥有并运营，用于支持海洋学研究。美国国家科学基金会是EWING的主要用户，在1994年，该船将支持超过200天的美国国家科学基金会资助的研究。这项研究的大部分将需要使用EWING的地震系统。EWING的地震系统由多达20个气枪和多达240个通道的水听器阵列组成。此时，系统获取的所有数据都直接写入磁带。科学家必须等到磁带满了，系统切换到一个新的磁带，然后才能进行任何数据分析。这个过程可能需要22分钟到8小时不等，具体取决于录制的频道数量。无法实时访问数据流，因此无法进行质量控制或初步数据处理。pi将在数据流和磁带驱动器之间放置一个SCSI分配器，以便实时地将数据的副本传递到工作站。该数据集可用于实时质量控制和初步处理。pi还将开发常规质量控制算法，实现低叠算法和数据显示，以帮助初步数据处理，通过船载计算机网络为喜欢使用自己的地震处理软件的科学家提供标准的SEG-Y磁盘文件，并为软件提供文档。

Proposal No. 94-01209 This award provides funding for an improved seismic quality control and display system aboard the R/V EWING, a 208 foot vessel that is owned and operated by LDEO in support of oceanographic research. NSF is the primary user of the EWING, and in 1994 the ship will support over 200 days of NSF-funded research. Much of this research will require use of the EWING's seismic system. The EWING's seismic system consists of up to 20 airguns and a hydrophone array of up to 240 channels. At this time all data acquired by the system is written directly to magnetic tape. Scientists must wait until the magnetic tape is full and the system has switched to a new tape before any data analysis may be attempted. This process can take anywhere from 22 minutes to 8 hours depending on the number of channels being recorded. Real-time access to the data stream is not available, and therefore, no quality control or preliminary data processing is possible. The PIs will place a SCSI splitter between the data stream and the tape drives to pass a copy of the data to a workstation in realtime. This data set could be used for realtime quality control and preliminary processing. The PIs will also develop routine quality control algorithms, implement low-fold stacking algorithms and data displays to aid in preliminary data processing, provide standard SEG-Y disks files via the shipboard computer network for scientists who prefer to use their own seismic processing software, and provide documentation for the software.