Hi everyone,

I've submitted a file at that describes a faster version of the
selpfbb subroutine. This subroutine is mostly used when there are
measured values of a, b, and bb. In this case, the new version of the
subroutine provides much faster calculations than versions provided
with Hydrolight. This is important because accurate calculations need
a fairly small value for the tolerance in bb/b at the ABACBB screen of
the user interface.

The improvement in the speed of the calculations and the results of
the calculations will vary depending on the IOPs, the physical
specifications (how deep, how many wavelengths, etc.) as well as
depending on the particular version of Hydrolight that you use. This
subroutine has been tested with a few different revisions of
Hydrolight 4.2 (an early version of Hydrolight 4.2, as well as the
with the latest revision). I have not yet tested it with Hydolight
4.1, some versions of which also have the selpfbb.f subroutine. I'd be
interested in hearing from anyone who has Hydrolight 4.1 about how
well it works.

The pdf file describing the subroutine is in the "Files" section at:
http://groups.yahoo.com/group/HydroLightUsers/files/selpfbb_faster_MJM.pdf

The new subroutine is also in the "Files" section, and is at:
http://groups.yahoo.com/group/HydroLightUsers/files/selpfbb.f

-Marcos Montes
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