Archive of Digital Boomer and Chirp Seismic Reflection Data Collected During USGS Cruises 01RCE05 and 02RCE01 in the Lower Atchafalaya River, Mississippi River Delta, and Offshore Southeastern Louisiana, October 23-30, 2001, and August 18-19, 2002

In October of 2001 and August of 2002, the U.S. Geological Survey conducted geophysical surveys of the Lower Atchafalaya River, the Mississippi River Delta, Barataria Bay, and the Gulf of Mexico south of East Timbalier Island, Louisiana. This report serves as an archive of unprocessed digital marine seismic reflection data, trackline maps, navigation files, observers' logbooks, GIS information, and formal FGDC metadata. In addition, a filtered and gained GIF image of each seismic profile is provided.

The archived trace data are in standard Society of Exploration Geophysicists (SEG) SEG-Y format (Barry and othes, 1975) and may be downloaded and processed with commercial or public domain software such as Seismic Unix (SU). Examples of SU processing scripts and in-house (USGS) software for viewing SEG-Y files (Zihlman, 1992) are also provided. Processed profile images, trackline maps, navigation files, and formal metadata may be viewed with a web browser. Scanned handwritten logbooks and Field Activity Collection System (FACS) logs may be viewed with Adobe Reader.

For more information on the seismic surveys see http://walrus.wr.usgs.gov/infobank/g/g601la/html/g-6-01-la.meta.html and http://walrus.wr.usgs.gov/infobank/g/g102gm/html/g-1-02-gm.meta.html

These data are also available via GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean ( http://www.virtualocean.org/) earth science exploration and visualization applications.

2001年10月与2002年8月，美国地质调查局（U.S. Geological Survey）对路易斯安那州东廷巴利尔岛以南的下阿查法拉亚河、密西西比河三角洲、巴拉塔里亚湾及墨西哥湾海域开展了地球物理勘探。本报告作为未处理数字海洋地震反射数据、测线图、导航文件、观测员日志、地理信息系统（Geographic Information System，GIS）资料以及正式联邦地理数据委员会（Federal Geographic Data Committee，FGDC）元数据的存档载体，同时还提供了每份地震剖面经滤波与增益处理后的图形交换格式（Graphics Interchange Format，GIF）图像。

存档的道数据采用标准勘探地球物理学家协会（Society of Exploration Geophysicists，SEG）SEG-Y格式（Barry等人，1975），可通过商业软件或公有领域软件（如地震Unix（Seismic Unix，SU））进行下载与处理。此外还提供了SU处理脚本示例，以及用于查看SEG-Y文件的美国地质调查局内部软件示例（Zihlman，1992）。处理后的剖面图像、测线图、导航文件及正式元数据可通过网页浏览器查看，扫描版手写日志与野外活动收集系统（Field Activity Collection System，FACS）日志则需使用奥多比阅读器（Adobe Reader）查看。

如需了解本次地震勘探的更多详情，请访问以下链接：http://walrus.wr.usgs.gov/infobank/g/g601la/html/g-6-01-la.meta.html 与 http://walrus.wr.usgs.gov/infobank/g/g102gm/html/g-1-02-gm.meta.html。

本数据集还可通过地球科学勘探与可视化应用GeoMapApp（http://www.geomapapp.org/）及Virtual Ocean（http://www.virtualocean.org/）获取。