l977ar.m77t - MGD77 data file for Geophysical data from field activity L-9-77-AR in Arctic from 08/25/1977 to 10/08/1977
Single-beam bathymetry, magnetics, and gravity data along with transit satellite navigation data was collected as part of field activity L-9-77-AR in Arctic from 08/25/1977 to 10/08/1977, http://walrus.wr.usgs.gov/infobank/l/l977ar/html/l-9-77-ar.meta.html
These data are reformatted from space-delimited ASCII text …