The data files in the ftp directory have been gzipped and should be transferred as binary files. This should be a setable feature of your Web Browser. One must realize that the representativeness of IFA averaged data is best during these three cruises and must be used with caution at other times. A description of this gridded data product is given in Ciesielski et al.
Surface pressure represents pressure reduced to sea level.
For this reason the values of Q1 and Q2 at the surface, which involves these variables, are not provided. For each six hour period there are 42 lines of data. Omega is set to zero at the surface and at 75 mb. For each six hour period there are 42 lines of data. For each six hour period there are 41 lines of data.