@Override
public StationTimeSeriesFeature subset(DateRange dateRange) throws IOException {
return subset(CalendarDateRange.of(dateRange)); // Handles dateRange == null.
}
/**
* get time coverage as CalendarDateRange
*
* @return time coverage, or null if none
*/
public CalendarDateRange getCalendarDateCoverage() {
return CalendarDateRange.of(tc);
}