Calibrations from doy 170, 1987 were used to calibrate:
   doy 170
   doy 172
   doy 173
   doy 175

Calibrations from doy 176, 1987 were used to calibrate:
   doy 176
   doy 177
   doy 178
   doy 180

There were changes between doy 173 and 175 in the west.

Cathy (6/16/95)