ANNOUNCEMENT OF
               SEA LEVEL PROCESSING SOFTWARE
            FOR IBM PC-COMPATIBLE MICROCOMPUTERS
             Version 3.0 (Year 2000 Compliant)
                              
     The University of Hawaii Sea Level Center (UHSLC) in
collaboration with the National Oceanographic Data Center
(NODC) has prepared a software package for sea level data
processing designed for IBM PC compatible microcomputers
under the DOS operating system.  The package includes three
principle components: 1) tidal analysis and prediction, 2)
quality control, and 3) filtering.  The software is geared
to persons with prior knowledge of the DOS environment as
well as a basic understanding of sea level processing.  The
goal is to share software on a commonly available platform
(the personal computer) that will enhance the quality of
your sea level data sets.  This in return will promote the
growth of the international archives of sea level, thus,
providing scientists with greater opportunities to
understand the ocean.  The UHSLC encourages contibutions to
its expanding global archive.


SYSTEM REQUIREMENTS

     This package has been developed for use on IBM PC XT, AT, 
386, 486, or pentium compatible microcomputers and clones.  It 
is designed for 'command line' mode, not for Windows.  Because
of the plotting subroutines and the complex mathematical
algorithms of the tidal analysis program, the execution of
the programs will be much faster if the host system has a
math coprocessor.  For an indication of the differences in 
execution time for various host systems, the Tidal Analysis 
Function takes the following amount of time:

               machine             execution time
               pentium                  ~seconds
               386, 20 Mhz              1.5 minutes
               XT with 8087, 4.77 Mhz   14  minutes
               XT, no 8087, 4.77 Mhz    2 hours

The plotting subroutines require a display card capable of
supporting graphics in the EGA, CGA, VGA, or Hercules modes,
and support hardcopy output on most IBM and Epson printers
as well as on most HP PC laser and wet ink plotters.  Plot
output as a PostScript file also available.  The package works 
best with at least 512 Kbyte of memory and assumes the system 
supports a hard disk drive and optionally a 1.4 Mbyte 3.5 inch
disk drive.

     The batch files of the UHSLC/NODC package utilize PC-
DOS or MS-DOS operating system versions 3.1 or greater, and
the source codes of the programs were compiled with the
Micro-Soft FORTRAN Optimizing Compiler version 4.10.  The
graphics subroutines are provided by PLOTWORKS, INC.

HOW TO OBTAIN

     The package is packed into a self-creating ZIP file
(PKZIP) of the name:          slpaq2.exe    (1.4 megabytes)

Anonymous FTP
=============

          enter:         ftp kapau.soest.hawaii.edu

          at user prompt enter:  anonymous
          at password prompt:    your email address
                         (ie. caldwell@soest.hawaii.edu)

          after login, enter:   cd pub/sealev/software

          set transfer to binary:   binary

          grab files:    get read.1st
                         get ver3hist.txt
                         get slread2.me
                         get slpaq2.exe
                         get slman2.ps

          exit ftp:                 bye

Diskette
========
The compressed self-expanding version fits on a single
3.5" high density diskette.

Unpacking the Package
=====================
1) Make subdirectory SLPR2

(Do you have a subdirectory called SLPR2?  If so, please
rename it to something else because the automatic unpacking
and code require the first directory be SLPR2.  Also, the
package must be placed on and executed from Drive C:)

2) Place the file "slpaq2.exe" on C:\SLPR2.

3) type: slpaq2.exe -d

This will unpack the software and create a directory tree
under the directory SLPR2.  It requires about 4 megabytes of
space.  One can delete slpaq2.exe after expansion.

The manual, slman2.ps, can be printed on any PostScript
compatible printer or plotter.

Please send me an email to let me know you have obtained a
copy.  I maintain a list of recipients so that I can send
notices of changes.  I would also like to obtain your paper
mail address for our records.  If the software is shared
with others, please give me their name and address.

Comments or questions:

Mr. Patrick Caldwell
UH Sea Level Center
University of Hawaii
1000 Pope Road, MSB 317
Honolulu, Hawaii 96822 USA

phone: 808-956-4105
fax: 808-956-2352
email: caldwell@soest.hawaii.edu