j281nc.m77t and j281nc.h77t: MGD77T data and header files for single-beam bathymetry data for field activity J-2-81-NC in Carmel Bay, Monterey Bay, Northern California from 06/23/1981 to 06/30/1981

Single-beam bathymetry data along with miniranger navigation data was collected as part of the U.S. Geological Survey cruise J-2-81-NC. The cruise was conducted in Carmel Bay, Monterey Bay, Northern California from June 23 to June 30, 1981. The chief scientist was John Dingler from the USGS Coastal and Marine Geology office in Menlo Park, CA. The geophysical source was a 12 kilohertz (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/j/j281nc/html/j-2-81-nc.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.

本数据集为美国地质调查局（U.S. Geological Survey, USGS）J-2-81-NC科考航次采集的单波束测深数据与Miniranger型导航数据。该航次于1981年6月23日至6月30日在北加州卡梅尔湾与蒙特雷湾开展，首席科学家为来自加州门洛帕克市美国地质调查局海岸与海洋地质办公室的约翰·丁格勒（John Dingler）。本次航次的地球物理探测源为12千赫兹（kHz）系统。
本数据集由存储于http://walrus.wr.usgs.gov/infobank/j/j281nc/html/j-2-81-nc.meta.html的海岸与海洋地质计划（Coastal and Marine Geology Program, CMGP）信息库野外活动目录中的空格分隔ASCII文本文件转换而来，转换后的格式为美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）下属国家地球物理数据中心（National Geophysical Data Center, NGDC）发布的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）。有关该格式的详细信息，可查阅本元数据文件交叉参考部分所列的相关出版物。