A different features vector is printed based on whether the form factor
is less than 0.5 (indicating a semi-diurnal site) or greater than or
equal to 0.5 (indicating a diurnal or mixed semi-diurnal site). If the
four harmonic constituents M2 S2 K1 O1 are not included in the fit, then
the features vector cannot be calculated and is not printed.
Phase lags are always printed with respect to UTC. The utc
argument of coef.tide can be used to produce phase lags for
different time zones.