+---------------------------------+
| Notification of New Data Stream |
+---------------------------------+

This is your notification of a new data stream that we will be distributing
from the XDC to the EC & Archive.

The following information should fully describe the new data stream.  If you 
have any questions about this, please send them to the sender of this message.

    Sending to:

	_x_  Archive             (raw data)
	_x_  Experiment Center   (raw data)
	___  other ()


    File Information:

	Filename format(s):	
				Raw Data:
				twpecmfsurfX1.00.yymmdd.hhmmss.raw
				twpecmfupaX1.00.yymmdd.hhmmss.raw
				twpecmfsuppX1.00.yymmdd.hhmmss.raw
				
	Frequency:		
	
				1 tape's worth per month sent via site transfer
				(1 tape has approx. 1.5 Gigabytes of data)
				To be sent approximately 10:30 am EST.
				
				
				

       	Number of files & Size per month (per tape):            
       	  
platform_name        # of files    file size (min.)        file size (max.)
========================================================================
twpecmfsurfX1.00        1           131,765,760              145,883,520
twpecmfupaX1.00         4            89,164,800              178,329,600
twpecmfsuppX1.00        1            62,415,360               69,102,720
                   
                                                         	

    Source Instrument(s):
    
    External Data Source: ECMWF (European Centre for Medium-Range Weather
Forecasts)  
    			   

    Instrument Mentor(s):  Ric Cederwall


Additional Notes:

    We have a contract with ECMWF to provide us with one 
year's worth of data, beginning with the October 1996 data. The 
area of coverage is Latitude: +20 to -20, longitude: -80 to +110. 
Data are delivered on 8mm Exabyte tapes in FM92-VIII Ext. GRIB Ed. 1
format.

    As of July 24, 1997, we have received 7 tapes covering 961001 - 970630.
We plan on starting to send the backlog of data on 7/28/97, sending
1 tape's worth of data per day for the next 6 days. We will then
send the data as we receive and process each tape, which is once per 
month.
 
    For more information on the data and the content see the
description of the XDC TWP model data at --
http://www.xdc.arm.gov/sisg/twp/twpmodel.html