NOAA-12 AVHRR DAY & NIGHT SST EQUATIONS
--------------------------------------------------------------------------
             NOAA 12 SST Equations 3/8/94

***NOAA-12 NOT CURRENTLY USED IN GLOBAL OPERATIONAL PROCESSING*** 
          
             Regression Output:MCSST TRIPLE night
    Constant                   -271.971
    Std Err of Y Est           0.476915
    R Squared                  0.99384
    No. of Observations             761
    Degrees of Freedom              757
    Features          T3.7-T12 T11      SEC0-1
    X Coefficient(s)  0.911173 1.000281 1.710028
    Std Err of Coef.  0.015322 0.003874 0.103441
        
             Regression Output:MCSST  DUAL night
    Constant                   -279.846
    Std Err of Y Est           0.567181
    R Squared                  0.991287
    No. of Observations             761
    Degrees of Freedom              757
    Features          T3.7-T11 T11      SEC0-1
    X Coefficient(s)  1.288548 1.031355 2.265075
    Std Err of Coef.  0.026994 0.004349 0.121913
    
             Regression Output:MCSST SPLIT night
    Constant                    -263.94
    Std Err of Y Est           0.511227
    R Squared                  0.992921
    No. of Observations             761
    Degrees of Freedom              757
    Features          T11-T12  T11      (T11-T12)*(SEC0-1)
    X Coefficient(s)  2.384376 0.967077 0.480788
    Std Err of Coef.  0.049375 0.004568 0.061476
    
             Regression Output:NLSST TRIPLE night
    Constant                   -260.854
    Std Err of Y Est           0.469015
    R Squared                  0.994042
    No. of Observations             761
    Degrees of Freedom              757
                       Tsfc*
    Features         (T3.7-T12)    T11    (SEC0-1)
    X Coefficient(s)  0.033139 0.963368 1.731971
    Std Err of Coef.  0.000546 0.004158 0.101668
        
             Regression Output:NLSST DUAL night
    Constant                     -276.9
    Std Err of Y Est           0.537463
    R Squared                  0.992176
    No. of Observations             761
    Degrees of Freedom              757
                        Tsfc* 
    Features          (T3.7-T11) T11     SEC0-1
    X Coefficient(s)  0.050549 1.021468 2.201377
    Std Err of Coef.  0.000987 0.004195 0.115597
    
             Regression Output:NLSST SPLIT night
    Constant                   -240.229
    Std Err of Y Est           0.475031
    R Squared                  0.993888
    No. of Observations             761
    Degrees of Freedom              757
                        Tsfc*
    Features          (T11-T12) T11     (T11-T12)*(SEC0-1)
    X Coefficient(s)  0.081646 0.888706 0.576136
    Std Err of Coef.  0.001537 0.005243 0.056038
    
             Regression Output:NLSST SPLIT Day
    Constant                   -236.667
    Std Err of Y Est           0.483151
    R Squared                   0.98784
    No. of Observations             419
    Degrees of Freedom              415
                                  Tsfc*
                      T11     (T11-T12) (T11-T12)*(SEC0-1)
    X Coefficient(s)  0.876992 0.083132 0.349877
    Std Err of Coef.  0.009262 0.00166  0.073627
    
             Regression Output:MCSST SPLIT Day
    Constant                   -263.006
    Std Err of Y Est           0.540754
    R Squared                  0.984767
    No. of Observations             419
    Degrees of Freedom              415
                      T11      T11-T12  (T11-T12)*(SEC0-1)
    X Coefficient(s)  0.963563 2.579211 0.242598
    Std Err of Coef.  0.009217 0.058894 0.082973

Revised NOAA 12 AVHRR Day and Night SST Equations 3/08/94
      
MCSST=linear Multi-Channel Sea Surface Temperature algorithm.
NLSST=Non-linear Sea Surface Temperature algorithm. 
All equations based on December 1993 drifting buoy matchups.
T3.7,T11,T12=AVHRR channels 3,4,5 brightness temperatures (Deg.K)
SEC0=secant of satellite zenith angle.

Tsfc is an apriori estimate of surface temperature (degrees
Celsius).  It can be based on a satellite only or blended or
climatological based field analysis, or derived from the actual
satellite measurements using one of the MCSST equations.  In
operational use Tsfc is limited to the range between 28 and -2 Deg
Celsius.  NOAA 11 continues to be used operationally at NESDIS for
operational global processing. 

Example of use:
Night MCSST SPLIT Eqn.=0.967077*T11+2.384*(T11-T12)+0.481*(T11-
T12)*(SEC0-1)-263.94 (Deg. Centigrade).


                               ######