Updates to Appendix B in NOAA TM NESS 107 for NOAA-D/12
                                 (9/13/91)


The following information is an amendment to Appendix B:

1.   Replace the MSU (FM-11) nonlinearity corection coefficients
     (Page 4, Section II) with the following values:

     CHANNEL      D              D             D
                                  1             2

       1       1.35345        0.983371     0.583532E-5
       2      15.31447        0.975793     0.644099E-5
       3       9.49319        0.983649     0.442475E-5
       4      26.91490        0.973525     0.612575E-5

2.   Replace the band correction coefficients for channel 13 of 
     the HIRS/2 (FM7) (Page 6, Section IV) with the following
     values:

     CHANNEL      V             B             C
                   C    

       13      2190.37        0.078        1.00042