LIM - limnological conductivities,
salinities, and densities.LIM - limnological conductivities,
salinities, and densities.
M_Map is a collection of routines that allow you to draw publication-quality maps in 18 different projections. M_Map includes a simple coastline and elevation database, and allows you to add your own data to those maps. Requires Matlab version 5 (or higher).
Now available for downloading - version 1.4f (released Dec 2011), as tar or zip file (if you are unpacking the zip, REMEMBER TO UNZIP SUBDIRECTORIES AS WELL - this is by far the most common problem people have).
One widely-used program for performing harmonic analysis of
oceanic
tides is the FORTRAN 
package
created by Mike Foreman (IOS), available at http://www.pac.dfo-mpo.gc.ca/sci/osap/projects/tidpack/tidpack_e.htm.
However, the code is old, and difficult to understand and modify.
Together with Steve Lentz and Bob Beardsley, I have rewritten that
package in
MATLAB, incorporating many useful extras. Currently the code is
apparently
trustworthy for performing a complete analysis. Confidence
intervals
for the analysis can also be calculated.
(1 Dec 2001) a new function "t_xtide" now provides tidal predictions in matlab for many stations worldwide using the XTIDE database!!
(Oct 2002) T_tide described in:
Please cite this article if you find T_Tide useful!
The original version of the package (1/Dec/2001) is available as a zip file here: http://www.eos.ubc.ca/~rich/t_tide/t_tide_v1.1.zip
Enjoy!
A newer version (Jan/2003) is available as a zip file here: http://www.eos.ubc.ca/~rich/t_tide/t_tide_v1.2beta.zip. This includes a way of handling time series with many points (e.g. every minute for a year) without running out of memory, and a really preliminary attempt at analyzing 18.6+ year time series (which is really not right, so don't use it for this purpose!). Note: the recommended way of handling time series longer than one year but less than 18.6 years in length is to do it in one-year chunks - do not just suck in a 3 year time series.
(Feb/2007) An experimental version of T_Tide that includes support for robust rather than the usual least-squares fitting is available from David Jay and Keith Leffler (who spend far more time thinking about tides than I do, these days). Their modifications will be incorporated into the current version at some point.
(Mar/2011) I've modified v1.2b by changing finite to isfinite
and call to obsoletsignal processing toolbox functions psd and csd
to the newer functions pwelch and cpsd , which stops a list of annoying warnings.
This newer version is available as a zip file here: http://www.eos.ubc.ca/~rich/t_tide/t_tide_v1.3beta.zip.
This includes a way of handling time series with many points (e.g.
every minute for a year) without running out of memory, and a really
preliminary attempt at analyzing 18.6+ year time series (which is
really not right, so don't use it for this purpose!). Note: the recommended way of handling time
series longer than one year but less than 18.6 years in length is to do
it in one-year chunks - do not just suck in a 3 year time series.
of lake water (or seawater at salinities less than about 4) from its
chemical composition? Do you want to compute
lake salinity from conductivity (to get density?). Then THIS is the
toolbox for you! Contents are:
This is an updated version of the air-sea interaction toolbox
originally developed by Bob Beardsley et al. (available through the SEAMAT page). This
toolbox is useful if you want to compute the fluxes of heat and stress
across the oceans surface (and assorted related things) from standard
measurements of temperature, wind, etc. The update (v1.1) available here as
a tar-file (or here
as a gzipped tar file ) contains many additions and enhancements
to the original code.
The air-sea toolbox has been upgraded to v2.0 and is no longer distributed here - go to the SEAMAT page to get the new version!
Although the RDI binary and P-file formats are compact and efficient
for storing data, it would be handy to be able to read that data into
MATLAB. There are in fact various
existing toolboxes that purport to do this, but I have found that
they are a) much too complicated for what I want (requiring
netcdf, etc.), b) or
they don't work, or c) both. One reason why these programs often don't
work
is because RDI is constantly changing (improving?) the format of their
files. After several years of off-and-on development I think I have all
(well,
most) of the various firmware/version dependencies sorted
out....so...presenting:
RDADCP_mar10v0.zip - Two functions (rdpadcp.m and rdradcp.m) designed to read RDI binaries!
Also included is a demo script (adcpdemo) so you can see how it works.
These functions have been tested on datafiles from about half a
dozen different instruments, with various firmware and software
versions, and with consultation from RDI. However, I know that
YOUR instrument
is some weird custom job that will immediately break it...if so please
let me know. If it works fine...I'd appreciate knowing about it as
well.
Sep 2007 - Try some of these
ADCP Processing Tools with a GUI written by Marius Becker.
Changes:
Nov/2003 - added support for navigation data in VMDAS and WINRIVER
r-files.
Aug/2004 - Some handling of junk data at beginning and end of file
(apparently required for moored ADCPS using several flash cards)
Sep/2005 - If your data was very, very, very noisy then the default
median
cleaning could bias results slightly negative due to a bug. This is now
fixed.
Dec/2005 - better handling of corrupted data blocks.
Mar/2006 - OS/OO and WH-navigators now handled.
Oct/2006 - WINRIVER R-file handling fixed.
Mar/2010 - a lot of minor updates.
BIOSONICS now has a nice digital echosounder that writes files in a binary format "for later use". This binary format has files ending in '.dt4'. If you want to read this stuff into matlab, use RDDTX.m (note - currently it only works for a single beam, single transducer system - NOT dual or split-beam systems).
Seabird CTD processing software creates a nice self-describing
data file in which the various header lines describe the contents. ctd_rd.m can read this format to produce a
data structure containing the profile data, with field names taken from
the column labels.
A collection of routines useful for oceanographers, including the
UNESCO routines (specific heat capacity, the equation of state, etc.),
various sound-speed equations, T/S diagrams, distances on an
ellipsoidal
earth, and more.
As of 2010, I would heartily recommend going somewhere instead of using this old, obsolete, and
superceded toolbox.
For equation of state and thermodynamics stuff, go to the TEOS-10 website.
Ellipsoidal distance are best handled by an algorithm in M_Map .
Extended contouring capabilities for Matlab. Can handle parametric
surfaces, filled contours, publication-quality labelling and more.
As of v5.2 contourf.m and contours.m are satisfactory. However, clabel.m is still missing a few things which should (hopefully) be available in 5.3, when that comes out. A version of clabel.m for 5.2 that allows for such things as changing the font size and label spacing is available here .
By v5.3 you don't need to come here any more!