December 4th, 2003

Changes to the NOAA Product ID for GOES Images in the
NOAA-Specific Lrit Header Record
=====================================================

A planned system change will occur with the next release of the LRIT
Transmission System, which will affect the NOAA Product ID field.  This 
change will occur for GOES image-type products.  Prior to this change,
all GOES images had a NOAA product ID of seven (7).  With the new system, 
the GOES images will have a NOAA product ID that will signify which GOES
spacecraft generated the image.  The NOAA Product SubID and Parameter fields,
also contained within header #129 (the NOAA LRIT Header), will remain
unchanged.  The new values for the NOAA product ID are given in the 
table below:

     NOAA Product ID     Spacecraft
     ---------------     ----------
           10            GOES-10
           11            GOES-11
           12            GOES-12
         13-40           Reserved for future GOES spacecraft
           38            GOES-8 (temporary use as required)
           39            GOES-9 (temporary use as required)

The NOAA product IDs 0-6 and 8 were already reserved for other data types 
and could not be used for GOES spacecraft.

The product subID field will remain unchanged; thus a one (1) will signify 
an IR full disk, a two (2) will signify an IR northern hemisphere, and so on.
The parameter field will signify the image resolution as before.

This system change is expected to take place in early 2004; however, 
test periods may occur before then in which the new product IDs are used.
These test periods will be announced beforehand on this website and also by 
LRIT administrative messages.

An updated IdList.txt file, applicable to the Domain 6 software provided 
on the LRIT website, will be made available shortly.