Notes on the data hierarchy for UHDAS logging:

Example cruise

Suppose you have a cruise with the name “vg0810” :

• Data logs under /home/data/vg0810 on the ADCP linux computer “currents”. The active UHDAS cruise directory contains the following subdirectories (link shows expanded tree format)
• raw: logging goes on here in directories named by instrument
  • ADCP (wh300, nb150, os150, os75, os38)
  • ancillary (gpsnav, gyro, ashtech, posmv, seapath, mahrs, phins...)
  • config (configuration directory)
  • log (diagnostics directory)
• rbin: intermediate version of ancillary ascii data in “raw” subdirectory, stored as binary.
  • ancillary only (gpsnav, gyro, ashtech, posmv, seapath, mahrs, phins...)
• gbin: time-matched ADCP, navigation, attitude; time in UTC
• proc: one processing directory for each instrument+pingtype possible; CODAS processing
  • standard CODAS processing subdirectories
  • config (instrument configurations used at sea)
  • png_archive (figures from the web site)

Accessing data in the cruise directory

1. ADCP data in raw can be accessed using Matlab and the UH program ‘read.m’ These data, with no other information, will have velocity, amplitude, and correlation (or spectral width) in beam coordinates. The time is the instrument time, which was set to the computer time when logging was started. See the link below for more information.
2. ADCP data in raw and gbin can be combined using Matlab and the UH program get_xfraw.m. This will result in a file that includes earth coordinates, heading, position, and an estimate of ocean velocity. See the link below for more information.
3. The proc directory contains the processing tree for each instrument. One codas database (and supporting files) exists for each instrument+pingtype combination. In each processing directory (eg vg0810/proc/os75nb) these may be of interest:

data	files to use
coarse resolution averaged ocean velocity	vector/vect*.mat
moderate resolution averaged ocean velocity	contour/cont*.mat
every bin and every profile	contour/allbins_*.mat
figures from the cruise	png_archive
the database (for manual extraction)	adcpdb/a*.blk

Tools for Matlab access to data are listed here