Ship-based Trackline Geophysical Data (MGD77) acquired during the Eltanin expedition ELT20 (1965)

This data set was acquired with a ship-based Echosounder Sonar and Magnetometer during Eltanin expedition ELT20 conducted in 1965 (Chief Scientist: Dr. Albert P. Crary). These data files are of MGD77 format and include Magnetic Field and Singlebeam Bathymetry data and were processed after data collection.1965年实施的埃尔塔宁（Eltanin）号第20次科考航次（ELT20，首席科学家为阿尔伯特·P·克里里博士）期间，科研人员依托船载回声测深声呐与磁力仪完成了本数据集的采集工作。本次数据文件采用MGD77格式存储，涵盖磁场数据与单波束测深数据，且已于数据采集完成后完成预处理工作。