PROCEDURE: doy_to_month_date, year, doy, month, date NAME: doy_to_month_date PURPOSE: Determines month and date given the year and day of year. fast, vector oriented routine that returns the month and date given year and day of year (1<=doy<=366) CREATED BY: Davin Larson Oct 1996 FILE: doy_to_month_date.pro VERSION: 1.2 LAST MODIFICATION: 97/01/27