Introduction - If you have any usage issues, please Google them yourself
		 
 T_XTIDE Tidal prediction
 YOUT=T_XTIDE(STATION) makes a tidal prediction
 for the current day using the harmonics file XTIDE. Predictions
 at other times can be generated using [...]=T_XTIDE(STATION,TIM)
 where TIM is a vector of matlab-format decimal days ( DATENUM). 
 If TIM is a scalar then it is taken as the number of days present
 over which to make predictions. If TIM>1000 then it is taken to be
 the starting time in matlab-format.
 at the matlab time JD (UTC, but see code for details) where
 
 tau = lunar time
 	s = mean longitude of the moon
 	h = mean longitude of the sun
 	p = mean longitude of the lunar perigee 
 	np = negative of the longitude of the mean ascending node
 	pp = mean longitude of the perihelion (solar perigee)