l783sp.m77t - MGD77 data file for Geophysical data from field activity L-7-83-SP in Southern Pacific from 12/28/1983 to 01/03/1984

Single-beam bathymetry, gravity, and magnetic data along with transit satellite navigation data was collected as part of field activity L-7-83-SP in Southern Pacific from 12/28/1983 to 01/03/1984, http://walrus.wr.usgs.gov/infobank/l/l783sp/html/l-7-83-sp.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/l783sp/html/l-7-83-sp.bath.html http://walrus.wr.usgs.gov/infobank/l/l783sp/html/l-7-83-sp.grav.html and http://walrus.wr.usgs.gov/infobank/l/l783sp/html/l-7-83-sp.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.

本数据集包含单波束测深（Single-beam bathymetry）数据、重力数据、磁测数据以及过境卫星导航数据，采集自南太平洋地区的野外活动L-7-83-SP，采集时段为1983年12月28日至1984年1月3日。相关元数据可访问：http://walrus.wr.usgs.gov/infobank/l/l783sp/html/l-7-83-sp.meta.html

本数据集源自沿海与海洋地质计划（Coastal and Marine Geology Program, CMGP）信息库野外活动目录中的空格分隔ASCII文本文件，已被重新格式化为由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）提供的MGD77T格式，相关源文件地址分别为：http://walrus.wr.usgs.gov/infobank/l/l783sp/html/l-7-83-sp.bath.html、http://walrus.wr.usgs.gov/infobank/l/l783sp/html/l-7-83-sp.grav.html 及 http://walrus.wr.usgs.gov/infobank/l/l783sp/html/l-7-83-sp.mag.html。MGD77T格式包含头文档（说明文件）（.h77t）与数据文件（.m77t）两类文件。有关该格式的详细说明，可参阅本元数据文件交叉参考部分所列的相关出版物。