cyclones                Cyclone identification.
CCI			Calculus Cyclone Identification
cyclstat		Cyclone statistics and analysis
dX			zonal gradient
dY			meridional gradient
dT			rate of change
coefFit			Fit coefficients for a series of harmonics
coefDeriv		Use fitted harmonics to differentiate
coefInt			Use fitted harmonics to integrate
geoGrad			Topographical gradients east--west, north--south)
testReg.cal		a test function
derivFFT		Use FFT results to differentiate
integrFFT		use FFT results to integrate
testFFTcalc		a test function
filters			a set of filter types.
