I created a netcdf file by regridding a threads aggregation of monthly data with time values of integer number of months since 2006-06-01 (i.e. Time values are 7.0 to 66.0) to a seasonal_reg axis. The resulting time axis has the following values (in hours) that correspond to Feb-15, May-15, Aug-15, and Nov 15. SEASONAL_REG[4] 1095.7275, 3287.1825, 5478.6375, 7670.0925 yes? show axis seasonal_reg name axis # pts start end SEASONAL_REG TIME 4mr 15-FEB 15:43 15-NOV 14:05 T0 =3D 01-JAN-0000 00:00:00 Axis span (to cell edges) =3D 8765.82 (modulo length =3D axis span) Question 1: Does Feb 15 represent data from Feb 15 to May-15 or from Jan-15 to Apr-15? (Is Feb 15 the mid-point or the beginning point?) And does Nov 15 represent data from Nov 15 to Feb 15 or from Oct 15 to Dec 15? And is there a Ferret command that I should have found to display this info? Question 2: Why is the 15th of the month used instead of the first of the month? Penny Oots |