Tools All data files in this archive are provided in netCDF format. For your convenience, read files in C, with an accompanying Makefile (see below), are included. There are also many software packages freely available or licensed with utilities to access the data in netCDF-formatted files. You can find a comprehensive list of these software packages at http://www.unidata.ucar.edu/software/netcdf/software.html The data files contain variables that are a function of station and level. The variables include NODC country code, NODC ship code, NODC cruise number, time, latitude, longitude, echo sounder depth, number of observation levels, pressure, depth and temperature. read_UP.c Makefile More Useful Information Key to survey data (PDF, 37 KB) Panel module (PDF, 32 KB)