f484wo.m77t - MGD77 data file for Geophysical data from field activity F-4-84-WO in Washington, Oregon from 07/11/1984 to 08/15/1984

Single-beam bathymetry and magnetics data along with DGPS navigation data was collected as part of field activity F-4-84-WO in Washington, Oregon from 07/11/1984 to 08/15/1984, http://walrus.wr.usgs.gov/infobank/f/f484wo/html/f-4-84-wo.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/f/f484wo/html/f-4-84-wo.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.

本数据集包含单波束测深（single-beam bathymetry）、磁法数据与差分GPS（DGPS）导航数据，系华盛顿州与俄勒冈州野外作业F-4-84-WO的配套采集数据，采集时间为1984年7月11日至1984年8月15日，相关元数据详情可访问：http://walrus.wr.usgs.gov/infobank/f/f484wo/html/f-4-84-wo.meta.html
本次地球物理探测采用的设备为Knudsen 12 kHz 320B/R回声测深仪。
本数据集由存储于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以空格分隔的ASCII文本文件，重新格式化至美国国家海洋和大气管理局（NOAA）下属国家地球物理数据中心（National Geophysical Data Center, NGDC）提供的MGD77T格式，原始数据文件链接为：http://walrus.wr.usgs.gov/infobank/f/f484wo/html/f-4-84-wo.bath.html
MGD77T格式包含头文件（含文档说明，后缀为.h77t）与数据文件（后缀为.m77t）两类文件。有关该格式的更多细节，可查阅本元数据文件交叉参考部分所列的相关出版物。