Station Y_1 = January     Y_2 =July    Y_3 =Elevation
   u   [a_{u1},b_{u1}] [a_{u2},b_{u2}]   a_{u3} 
   1    [-18.4, -7.5]   [17.0, 26.5]      4.82  
   2    [-23.4, -15.5]  [12.9, 23.0]     14.78
   3    [-8.4, 9.0]     [10.8, 23.2]     73.16
   4    [10.0, 17.7]    [24.2, 33.8]      2.38
   5    [11.5, 17.7]    [25.8, 33.5]      1.44
   6    [11.8, 19.2]    [25.6, 32.6]      0.02