k178ar.m77t - MGD77 data file for Geophysical data from field activity K-1-78-AR in Barrows to Pt. Barrows, Arctic from 08/18/1978 to 09/18/1978

Single-beam bathymetry data along with DGPS navigation data was collected as part of field activity K-1-78-AR in Barrows to Pt. Barrows, Arctic from 08/18/1978 to 09/18/1978, http://walrus.wr.usgs.gov/infobank/k/k178ar/html/k-1-78-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/k178ar/html/k-1-78-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.

1978年8月18日至1978年9月18日，于北极巴罗至巴罗角（Pt. Barrows）区域执行野外活动K-1-78-AR期间，采集了单波束测深数据与差分全球定位系统(DGPS)导航数据，相关元数据详情可访问：http://walrus.wr.usgs.gov/infobank/k/k178ar/html/k-1-78-ar.meta.html
本次采集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(Coastal and Marine Geology Program, CMGP)信息库野外活动目录中存储的空格分隔型ASCII文本文件（来源链接：http://walrus.wr.usgs.gov/infobank/k/k178ar/html/k-1-78-ar.bath.html）重新格式化而来，转换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)制定的MGD77T格式。
MGD77T格式包含头文件（.h77t，含文档说明）与数据文件（.m77t）两类。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（Cross_reference）章节中列出的相关出版物。