cdm/src/main/java/ucar/nc2/iosp/nowrad/NOWRadheader.java
static public java.util.Date getDate(int julianDays, int msecs) {
        long total = ((long) (julianDays - 1)) * 24 * 3600 * 1000 + msecs;

        return new Date(total);
    }
static public java.util.Date getDate(int julianDays, int msecs) {
        long total = ((long) (julianDays - 1)) * 24 * 3600 * 1000 + msecs;

        return new Date(total);
    }
get jave date
@param julianDays
@param msecs
@return   java date