l877bs.m77t - MGD77 data file for Geophysical data from field activity L-8-77-BS in Bering Sea, Alaska from 07/29/1977 to 08/21/1977

Single-beam bathymetry, magnetics, and gravity data along with transit satellite navigation data was collected as part of field activity L-8-77-BS in Bering Sea, Alaska from 07/29/1977 to 08/21/1977, http://walrus.wr.usgs.gov/infobank/l/l877bs/html/l-8-77-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/l877bs/html/l-8-77-bs.bath.html http://walrus.wr.usgs.gov/infobank/l/l877bs/html/l-8-77-bs.grav.html http://walrus.wr.usgs.gov/infobank/l/l877bs/html/l-8-77-bs.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.

1977年7月29日至1977年8月21日，科研人员在阿拉斯加白令海海域执行野外作业L-8-77-BS期间，采集了单波束测深（Single-beam bathymetry）、磁法数据（magnetics）、重力数据以及子午卫星导航（transit satellite navigation）数据，相关元数据可通过以下链接获取：http://walrus.wr.usgs.gov/infobank/l/l877bs/html/l-8-77-bs.meta.html

本数据集源自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ASCII文本文件，对应的数据文件访问链接分别为：http://walrus.wr.usgs.gov/infobank/l/l877bs/html/l-8-77-bs.bath.html、http://walrus.wr.usgs.gov/infobank/l/l877bs/html/l-8-77-bs.grav.html、http://walrus.wr.usgs.gov/infobank/l/l877bs/html/l-8-77-bs.mag.html。现已将这些数据转换为美国国家海洋和大气管理局（NOAA）国家地球物理数据中心（NGDC）制定的MGD77T格式，该格式包含头（文档）文件（.h77t）与数据文件（.m77t）。有关该格式的更多详细信息，可查阅本元数据文件交叉参考部分所列的出版物。