hour       date   declination   rate of change    rate of change of change
                              =first derivative      =second derivative
 gmt       U.S.       o    '          '                       '
--------------------------------------------------------------------------
Equinox
12:00:00  3/19/03   S 0  36.5      
                                    23.7
   "      3/20/03   S 0  12.8                                0
                                    23.7
   "      3/21/03   N 0  10.9                                0
                                    23.7
   "      3/22/03   N 0  34.6    

Solstice
12:00:00  6/19/03   N23  25.3
                                     0.7
   "      6/20/03   N23  26.0                                0.3
                                     0.4
   "      6/21/03   N23  26.4                                0.3    
                                     0.1
   "      6/22/03   N23  26.3                                0.6
                                     0.7
   "      6/23/03   N23  25.6
 
In between
12:00:00  5/8/03    N17   3.2
                                    16.2
   "      5/9/03    N17  19.4                                0.4
                                    15.8
   "      5/10/03   N17  35.2                                0.2
                                    15.6
   "      5/11/03   N17  50.8                                0.3
                                    15.3
   "      5/12/03   N17  66.1