[Sea-mat] Matlab routine for Carter table correction

[Michael Meredith]

Dear SeaMat people

Please find attached a Matlab program (carter.m), which corrects
single-beam echosounder depths using Carter's tables. (As you
undoubtedly know, most ship's echosounders assume sound
velocity to be 1500m/s, which is only very approximate.
Carter's tables were thus produced to enable a correction to
a more realistic depth, using an assumed mean sound speed 
that depends on latitude and longitude.)

The Matlab code reads two ascii files to find the appropriate
correction, BOUNDARY2.DAT and CORRECTN2.DAT - these are
also attached. Instructions on use of this program are in 
comment lines at the start of the Matlab code, so will appear
in online help.

Perhaps this code might be useful to the users of the SeaMat
webpage? If so, then by all means post it there. If you could
flag up myself as the originator of this code, that would be
useful.

Best regards
Mike Meredith

***********************************************
Dr. Mike Meredith
Head of Atmosphere and Ocean Group
British Antarctic Survey
High Cross
Madingley Road
Cambridge CB3 0ET
United Kingdom

http://www.antarctica.ac.uk/staff-profiles/template.php?user=mmm

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