Last Updated: 	
                01-05-06        WSH
                07-01-03	MJC
		01-28-03	MJC
		10-18-02	MJC
**
** CHANGES as of 7/1/03
**
  The SSM/I algorithm is now being run twice a day.  The 00z run consists of
TDRR files from 00z and greater from the previous day and the 12z run consists
of TDRR files from 12z the previous day to 12z of the current day.
  The NASA Team 2 algorithm is being averaged by swaths.  The TDRR swaths are
being processed as soon as they are downloaded and the NASA Team 2 algorithm 
is applied to the swaths.  When enough data is accumulated, the algorithm swaths
are averaged to a 24 hour averaged product.


_________________________________________________________
DIRECTORIES:	Ice Concentration Algorithms and 
		brightness temperatures
			bs	Bootstrap
			br	Bristol
			cv	CAL-VAL
			n2	NASA Team 2
			nh	NIC hybrid
			nt	NASA Team
			85	85GHz Differencing
			tb	Brightness temperatures derived from
				DMSP F13 Antenna temperatures

/*************************************************************************/
/********************  BRIGHTNESS TEMPERATURES  **************************/
/*************************************************************************/

	The brightness temperatures are 16 bit short integers written 
on a Sun SPARC (Big Endian).  The temperatures have been multiplied by 
100 to keep 2 digits of precision.  The naming convention is as follows:
		tb_<yy><jjj>_<hem><res>_<run>z.f13
	where	yy  = year
		jjj = julian
		hem = hemisphere (n or s)
		res = resolution (a or b)
				a = 12.5km
				b = 25.0km
		run	= 00 or 12
	The temperatures are stacked according to Polarization and resolution.
The following explains how the temperatures are stacked:
	(Polarizations - v = vertical and h = horizontal)
		a = 85v, 85h
		b = 19v,19h,22v,37h,37h
DIMENSIONS :
	The following are dimensions for the :
		North			South		
25.0km		304X448			316X332
12.5km		608X896			632X664
/*************************************************************************/
/***************************   ALGORITHMS  *******************************/
/*************************************************************************/

	All binary files are in 8 bit unsigned integers (0-100%).

NAMING CONVENTION: <alg>_<yy><jjj>_<hem>_<run>z.f13
		where alg = algorithm
		      yy  = year
		      jjj = julian
		      hem = hemisphere n or s
                      run = 00 or 12
 f13 indicates the source of the satellite data DMSP f13.

DIMENSIONS :
	The following are dimensions for the :
		North			South		Algorithms
25.0km		304X448			316X332		bs,br,cv,n2,nh,nt
12.5km		608X896			632X664		85

MISC:  land mask is already inserted into the binary.

DATA:
	0-100		Ice Concentrations (%)
	150		Land
	160		Coast
	189		Weather contaminated pixels over open water
	199		Bad/Missing


/*************************************************************************/
To Download: right click on the binary, choose "save as",
             pick a place on your hard drive to store them.


Problems or questions:
Wanshu Huang     whuang@natice.noaa.gov

Documentation: 
	Navigate to http://science.natice.noaa.gov/index.htm and 
click on desired algorithm.  Click on the description link for that algorithm.  This will 
display the documentation.

For FTP access, navigate to http://science.natice.noaa.gov/ftp_request_new.htm.