l182nc.m77t - MGD77 data file for Geophysical data from field activity L-1-82-NC in Northern California from 02/02/1982 to 02/03/1982

Single-beam bathymetry and magnetic data along with DGPS navigation data was collected as part of field activity L-1-82-NC in Northern California from 02/02/1982 to 02/03/1982, http://walrus.wr.usgs.gov/infobank/l/l182nc/html/l-1-82-nc.meta.html
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/l/l182nc/html/l-1-82-nc.bath.html and http://walrus.wr.usgs.gov/infobank/l/l182nc/html/l-1-82-nc.mag.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.

本数据集包含单波束测深数据、磁测数据及差分全球定位系统（Differential Global Positioning System, DGPS）导航数据，为野外作业L-1-82-NC的采集成果，于1982年2月2日至1982年2月3日在北加利福尼亚州开展，相关元数据可访问：http://walrus.wr.usgs.gov/infobank/l/l182nc/html/l-1-82-nc.meta.html。
本数据集由美国海岸与海洋地质项目（Coastal and Marine Geology Program, CMGP）信息库野外作业目录中的空格分隔美国信息交换标准代码（ASCII）文本文件转换而来，转换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）提供的MGD77T格式，原始格式的单波束测深数据文件与磁测数据文件可分别通过以下链接获取：http://walrus.wr.usgs.gov/infobank/l/l182nc/html/l-1-82-nc.bath.html 与 http://walrus.wr.usgs.gov/infobank/l/l182nc/html/l-1-82-nc.mag.html。MGD77T格式包含头文件（文档文件，.h77t）与数据文件（.m77t）。有关该格式的更多详情，可查阅本元数据文件交叉参考部分所列的相关出版物。