l780bs.m77t - MGD77 data file for Geophysical data from field activity L-7-80-BS in Bering Sea, Alaska from 08/01/1980 to 08/26/1980

Single-beam bathymetry and gravity data along with DGPS navigation data was collected as part of field activity L-7-80-BS in Bering Sea, Alaska from 08/01/1980 to 08/26/1980, http://walrus.wr.usgs.gov/infobank/l/l780bs/html/l-7-80-bs.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/l780bs/html/l-7-80-bs.bath.html and http://walrus.wr.usgs.gov/infobank/l/l780bs/html/l-7-80-bs.grav.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.

1980年8月1日至1980年8月26日，科研人员在阿拉斯加州白令海开展野外作业L-7-80-BS期间，采集了单波束测深数据、重力数据以及差分GPS（DGPS）导航数据，相关元数据文件可通过以下链接查阅：http://walrus.wr.usgs.gov/infobank/l/l780bs/html/l-7-80-bs.meta.html

本数据集已从存储于海岸与海洋地质计划（CMGP）信息库野外作业目录中的空格分隔ASCII文本文件转换为美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）国家地球物理数据中心（National Geophysical Data Center, NGDC）提供的MGD77T格式，原始文件的访问链接分别为：http://walrus.wr.usgs.gov/infobank/l/l780bs/html/l-7-80-bs.bath.html 与 http://walrus.wr.usgs.gov/infobank/l/l780bs/html/l-7-80-bs.grav.html。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细信息，可参阅本元数据文件交叉引用部分所列的相关出版物。