f991cp.m77t and f991cp.h77t: MGD77T data and header files for single-beam bathymetry data for field activity F-9-91-CP in Central Pacific from 09/24/1991 to 09/25/1991

Single-beam bathymetry data along with GPS navigation data was collected as part of the U.S. Geological Survey cruise F-9-91-CP. The cruise was conducted in the Central Pacific from September 24 to September 25, 1991. The chief scientists was Jim Gardner from the USGS Coastal and Marine Geology office in Menlo Park, CA. The geophysical source was a 10 kilohertz (kHz) and 3.5 kHz system.
These data are reformatted from space-delimited ASCII text files located in the Coastal and Marine Geology Program (CMGP) InfoBank field activity catalog at http://walrus.wr.usgs.gov/infobank/f/f991cp/html/f-9-91-cp.meta.html into MGD77T format provided by the NOAA's National Geophysical Data Center(NGDC). The MGD77T format includes a header (documentation) file (.h77t) and a data file (.m77t). More information regarding this format can be found in the publication listed in the Cross_reference section of this metadata file.

单波束测深数据（single-beam bathymetry data）与GPS导航数据作为美国地质调查局（U.S. Geological Survey, 简称USGS）航次F-9-91-CP的一部分被采集。该航次于1991年9月24日至9月25日在中太平洋实施，首席科学家为来自加州门洛帕克市USGS海岸与海洋地质办公室的吉姆·加德纳（Jim Gardner），所用地球物理勘探声源为10千赫（kHz）与3.5千赫系统。
这些数据源自海岸与海洋地质计划（Coastal and Marine Geology Program, 简称CMGP）信息库野外活动目录（网址：http://walrus.wr.usgs.gov/infobank/f/f991cp/html/f-9-91-cp.meta.html）中的空格分隔ASCII文本文件，现已被重格式化为美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, 简称NOAA）国家地球物理数据中心（National Geophysical Data Center, 简称NGDC）提供的MGD77T格式。MGD77T格式包含头文件（文档文件，后缀为.h77t）与数据文件（后缀为.m77t）。有关该格式的更多详情，可查阅本元数据文件交叉引用部分所列的出版物。