l583hw.m77t - MGD77 data file for Geophysical data from field activity L-5-83-HW in Horizon Guyot, Necker Ridge, Hawaii, Johnston, Palmyra, Kingman Island from 10/29/1983 to 11/26/1983

Single-beam bathymetry data along with DGPS navigation data was collected as part of field activity L-5-83-HW in Horizon Guyot, Necker Ridge, Hawaii, Johnston, Palmyra, Kingman Island from 10/29/1983 to 11/26/1983, http://walrus.wr.usgs.gov/infobank/l/l583hw/html/l-5-83-hw.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/l583hw/html/l-5-83-hw.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.

1983年10月29日至11月26日，在Horizon Guyot（地平线海山）、Necker Ridge（内克尔海岭）及夏威夷、约翰斯顿岛、帕尔米拉环礁、金曼礁区域开展的野外作业L-5-83-HW中，采集了单波束测深数据（Single-beam bathymetry data）与差分GPS（DGPS）导航数据，相关元数据可通过以下链接查询：http://walrus.wr.usgs.gov/infobank/l/l583hw/html/l-5-83-hw.meta.html

本数据集源自海岸与海洋地质计划（Coastal and Marine Geology Program, CMGP）信息库野外活动目录下的空格分隔ASCII文本文件，已被重新格式化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。原始测深数据文件可通过以下链接获取：http://walrus.wr.usgs.gov/infobank/l/l583hw/html/l-5-83-hw.bath.html

MGD77T格式包含头文件（.h77t，附说明文档）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引用（Cross_reference）部分所列的相关出版物。