Here are some very recent data from the Spice Experiment, taken by a Sea-Bird CTD mounted on a SeaSoar. These data are provided in the form of a MATLAB MAT file:
The Sea-Bird records pressure (dbar), temperature (oC), and conductivity (mmho/cm) at a sampling rate of 24 Hz. This chunk of data is just over 2.6 hours long, during which time the SeaSoar was cycling from 5 to 320 dbar about every 12 minutes.
You will notice the variables RecordNumber and ScanNumber when you examine the data. RecordNumber is the number of seconds since the beginning of the deployment. ScanNumber cycles from 1 through 24, and refers to each 1/24 s sample of the 1 s record. Although you probably won't need these variables, they provide an unambiguous identification for every sample.
The MATLAB MAT file format is great for reading into MATLAB, but poor from every other standpoint. This sort of file is essentially impossible to read for somebody who does not want to use MATLAB, and is overly large as well. Read this file in MATLAB using the command:
You will need routines to calculate salinity and density given conductivity, temperature, and pressure. The CSIRO Seawater Toolkit will do the job in MATLAB.