# IFFT

gtsThe `IFFT`

function computes an Inverse Fast Fourier Transform of two Geo Time Series™
representing real and imaginary parts of FFT coefficients.

The result is the reconstructed Geo Time Series™. The ticks of this reconstructed GTS are the coefficient indices. They must be multipled by the original
bucketspan to space the ticks according to the decomposed Geo Time Series™. The bucketspan is equal to `X / (n * factor)`

where `X`

is the number of time
units in a second, `n`

is the number of coefficients and `factor`

is the scale factor returned by `FFT`

.