One-Minute Shot Point Navigation for Seismic-Reflection Data Collected in 1975 from Eastern Rhode Island Sound; Formatted for Use With Landmark (A75_6_SHOTNAV.TXT)

During 1975, the U.S. Geological Survey (USGS) conducted a seismic-reflection survey utilizing Uniboom seismics in eastern Rhode Island Sound aboard the Research Vessel Asterias. This cruise totalled 8 survey days. Data from this survey were recorded in analog form and archived at the USGS. Due to recent interest in the geology of Rhode Island Sound and in an effort to make the data more readily accessible while preserving the original paper records, the seismic data from this cruise were scanned and converted to TIFF images and SEG-Y data files. Navigation data were converted from LORAN-C time delays to latitudes and longitudes, which are available in ESRI shapefile format and as eastings and northings in space-delimited text format.1975年，美国地质调查局（U.S. Geological Survey, USGS）搭乘“阿斯特里亚斯号”研究船（Research Vessel Asterias），在罗德岛海峡东部海域开展了采用Uniboom震源地震勘探（Uniboom seismics）的反射地震勘探作业。本次航次共计8个勘测日。该勘探获取的数据以模拟格式记录，并由USGS归档留存。鉴于近期学界对罗德岛海峡地质研究的关注度提升，且为了在保留原始纸质记录的前提下提升数据可访问性，研究人员将本次航次的地震数据扫描并转换为TIFF图像与SEG-Y数据文件。导航数据由罗兰-C（LORAN-C）时间延迟值转换为经纬度坐标，该经纬度数据以ESRI形状文件（ESRI shapefile）格式提供，同时还附带以空格分隔的东向、北向平面坐标文本格式文件。