## This directory has files from NBP0104, GLOBEC Southern Ocean 2001
## Initial processing used simthenplotter.m to plot "old" simrad
## files from previous days off the rvdas system.  These files are on 
## the official cruise cd set (NBP0104sim1.d206.gz to d241).  

## The matlab file simthenplotter.m calls the PERL script simandmwaythen.pl
## (simrad and matlab way before now is the idea), which goes to the
## data directory, unzips the files, filters them for garbage, and
## writes out two files for each frequency, for each day
## The data file is called SIMf206out1.dat.gz for simrad day206, freq 1
## freq 1 is 38 kHz on the Nathanial B Palmer; freq 2 120 kHz, freq 3 200 kHz
##  There are associated time files for each data file, pulled from the
## header tacked on by the ship's RVDAS system.  Kathleen set it up with
## a new l_sim1 script file for the data logger, kept in the GLOBEC 
## subdirectory.  Remember that to use this, the speed should be set to 
## baud of 19200 on the serial data output on the simrad.  


## Data files have pings arranged in rows, with the first row starting with the 
## surface return, and going out to the 250th bin.  On the 120 and 200, the bins
## are one meter; on the 38 they are four (to 1000 meter range).  
## Time files have the ship time stamp converted to decimal day
## with the hour and minute pulled from the stamp in columns two and three
## for easy plot labelling.

## Also in the directory are PCOD files, with the ship lat and lon pulled
## from rvdas nav data files.  They were created by simgetlats.pl

## The pcod files were then merged with the time files to create llt
## files for each frequency and day.  The PERL script simtolats.pl
## does this by finding the first time that equals or exceeds the time
## stamp in the simrad file, and pulling the lat and lon off to create
## SIMf206llt1.dat for day 206 freq 1 and so on.

## The nav data are needed to run NBPplotsimflat.m, which plots out 
## a level (say 300 meters for the 75th bin on the 38 kHz) using
## etopo2 stuff written by John Klinck and modified by Scott Gallager and
## Karen Fisher (kef10@cornell.edu for more information).

## Happy Simrading.  8/30/01

ZZ