ABOUT_FLOATS is the jdata module of jLab.

 ABOUT_FLOATS  Historical dataset of eddy-resolving subsurface floats. 
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    FLOATS.MAT is a matfile containing historical eddy-resolving subsurface
    float data from the World Ocean Circulation Experiment (WOCE) 
    Subsurface Float Data Assembly Center (WFDAC), available online at
 
        http://wfdac.whoi.edu/                      ... or ... 
        ftp://ftp.whoi.edu/pub/users/woce-ssfdac/
 
    together with some supplementary datasets provided by individual PIs.
 
    LOAD FLOATS loads the structure FLOATS, with the following fields:
 
        floats.about         Pointer to this document       
        floats.experiments   Experiment names            {83 x 1 cell}
        floats.expid         Experiment id number        [1469 x 1 array] 
        floats.id            Float id number             [1469 x 1 array] 
        floats.dt            Sample interval in days     [1469 x 1 array] 
        floats.num           Date in DATENUM format      {1469 x 1 cell} 
        floats.lat           Latitude                    {1469 x 1 cell} 
        floats.lon           Longitude                   {1469 x 1 cell} 
        floats.t             Temperature in centigrade   {1469 x 1 cell} 
        floats.cv            Velocity u+iv in cm/s       {1469 x 1 cell}   
 
    NUM, LAT, LON, T, and CV are cell arrays, with one drifter per cell.
 
    Within each cell, the time NUM proceeds uniformly, i.e. without jumps.
    However, note that trajectories may include some gaps, marked by INFs. 
    Use FLOATFILL to fill these gaps with linear interpolation.  
 
    A number of routines are available in JLAB to work directly with such
    cell arrays, see JCELL.  In particular, CELLPLOT will plot such data.
 
    After 'load floats, type 'use floats' to map the structure fields 
    into named variables in the workspace--id, num, lat, lon, etc.
 
    The experiment names are found by experiments(expid(100)), for example,
    which returns the experiment name of the 100th float trajectory.
 
    To generate the above figure of the dataset, type 'about_floats --f'. 
 
    To convert the cell arrays into one long column vector, with a NAN 
    separating each float, type 'cell2col(num,lat,lon,t,cv);'.
 
    FLOATS.MAT is distributed as a part of JDATA, a supplement to the 
    software toolbox JLAB, and is available at http://www.jmlilly.net.
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    Float experiments
 
    A brief summary of the 33 different experiments is as follows.
    
       #  Experiment   PI           Type     Data Span     Source 
       -------------------------------------------------------------
       1    abaco      Leaman       RAFOS    1989--1994    DAC
       2    acuri      Rossby       RAFOS    1997--2000    DAC
       3    acwwp      Bower        RAFOS    1996--2000    DAC
       4    amuse      Bower        RAFOS    1993--1995    DAC
       5    canig      Ambar        RAFOS    1997--1999    DAC
       6    ebasn      Price        SOFAR    1984--1992    DAC
       7    gusrex     Owens        SOFAR    1980--1985    DAC
       8    ifmib      Zenk         RAFOS    1990--1994    DAC
       9    kapex      Boebel       RAFOS    1997--1999    DAC
       10   kdbe       Boebel       RAFOS    1992--1996    DAC
       11   kpxwh      Richardson   RAFOS    1997--1999    DAC
       12   lde        Rossby       SOFAR    1978--1979    DAC
       13   lsuri      Prater       RAFOS    1996--1997    DAC
       14   mode       Rossby       SOFAR    1972--1976    DAC
       15   nefbas     Owens        SOFAR    1986--1989    DAC
       16   noatl      Rossby       RAFOS    1993--1995    DAC
       17   prelde     Rossby       SOFAR    1975--1985    DAC
       18   semmed     Richardson   RAFOS    1993--1995    DAC
       19   sitel      Owens        SOFAR    1982--1985    DAC
       20   tasof      Schmitt      SOFAR    1989--1993    DAC
       21   topo       Ollitrault   SOFAR    1983--1989    DAC
       22   urigs      Rossby       RAFOS    1984--1985    DAC
       23   urisyn     Rossby       RAFOS    1988--1990    DAC
       24   wbc        Bower        RAFOS    1994--1997    DAC
       25   wdbe       Hogg         RAFOS    1992--1998    DAC
       26   wsub       Price        SOFAR    1991--1993    DAC
       27   labsea     Brandt       RAFOS    2004--2006    PI
       28   redsox     Bower        RAFOS    2001--2003    PI
       29   exp        Bower        RAFOS    2003--2008    PI
       30   mater      Gascard      RAFOS    1997--1998    PI
       31   sofargos   Gascard      RAFOS    1994--1995    PI
       32   esop       Gascard      RAFOS    1996--1998    PI
       33   pomme      Gascard      RAFOS    2000--2001    PI
 
    The first column is the float experiment ID number in floats.expid, 
    while the second column is a short experiment name, also listed in 
    floats.experiments.
 
    "DAC" indicates the data was obtained from http://wfdac.whoi.edu/, 
    and "PI" indicates it was obtained directly from the PI.  For the 
    WFDAC floats, sometimes wfdac.whoi.edu lists multiple PIs; here we 
    show only the first. 
 
    This includes all RAFOS and SOFAR from WFDAC apart from two, "trpac" 
    and "shbas" (Tropical Pacific and Shikoku Basin) which are rather 
    small, and also the only two outside of the Atlantic sector. 
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    Dataset creation
 
    For completeness, the m-file ABOUT_FLOATS also contains the processing 
    steps used in the creation of the WFDAC portion of FLOATS.MAT.
 
    If you wish to do this yourself, with JLAB on your search path, 
    'about floats --create' will create the FLOATS.MAT dataset by reading 
    in the original data, after these have been downloaded from the WFDAC
    and unzipped.  Specifically we use the data files ending in 'asc.zip'. 
 
    You'll need to make sure to put the directory containing the files on
    your Matlab search path using ADDPATH, e.g. 'addpath ~/Data/wocedac'.
    It is important that the containing directory have the name 'wocedac'.
 
    Note that the velocity CV in FLOATS.MAT is computed from latitude,
    longitude, and time using LATLON2UV.  
 
    Note that creation of the PI-provided datasets is not accomplished
    here.  This is because the heterogeneous nature of those data files 
    required a number of different processing steps.  The source data and 
    processing scripts for these datasets are available upon request. 
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    See also JDATA, ABOUT_DRIFTERS.
 
    'about_floats --f' generates the sample figure shown above.
 
    Usage: about_floats
           about_floats --create     
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    This is part of JLAB --- type 'help jlab' for more information
    (C) 2014--2015 J.M. Lilly --- type 'help jlab_license' for details    

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