k281ar.m77t - MGD77 data file for Geophysical data from field activity K-2-81-AR in Arctic from 08/04/1981 to 08/07/1981

Single-beam bathymetry data along with DGPS navigation data was collected as part of field activity K-2-81-AR in Arctic from 08/04/1981 to 08/07/1981, http://walrus.wr.usgs.gov/infobank/k/k281ar/html/k-2-81-ar.meta.html The geophysical source was a Knudsen 12 kHz 320B/R echosounder. 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/k/k281ar/html/k-2-81-ar.bath.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.本数据集采集自1981年8月4日至1981年8月7日北极地区的K-2-81-AR野外作业，包含单波束测深数据与差分全球定位系统（DGPS, Differential Global Positioning System）导航数据。相关元数据可通过以下链接查阅：http://walrus.wr.usgs.gov/infobank/k/k281ar/html/k-2-81-ar.meta.html 本次探测所用的地球物理声源为Knudsen 12 kHz 320B/R型回声测深仪。 本数据集由美国海岸与海洋地质计划（CMGP, Coastal and Marine Geology Program）信息库野外作业目录中的空格分隔ASCII文本文件重新格式而来，转换后的格式为美国国家海洋和大气管理局（NOAA, National Oceanic and Atmospheric Administration）下属国家地球物理数据中心（NGDC, National Geophysical Data Center）制定的MGD77T格式。原始数据文件可通过以下链接获取：http://walrus.wr.usgs.gov/infobank/k/k281ar/html/k-2-81-ar.bath.html MGD77T格式包含头文件（.h77t，含文档说明）与数据文件（.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。