def fourier_segments(self):
        """ Return a list of the FFT'd segments.
        Return the list of FrequencySeries. Additional properties are
        added that describe the strain segment. The property 'analyze'
        is a slice corresponding to the portion of the time domain equivelant
        of the segment to analyze for triggers. The value 'cumulative_index'
        indexes from the beginning of the original strain series.
        """
        if not self._fourier_segments:
            self._fourier_segments = []
            for seg_slice, ana in zip(self.segment_slices, self.analyze_slices):
                if seg_slice.start >= 0 and seg_slice.stop <= len(self.strain):
                    freq_seg = make_frequency_series(self.strain[seg_slice])
                # Assume that we cannot have a case where we both zero-pad on
                # both sides
                elif seg_slice.start < 0:
                    strain_chunk = self.strain[:seg_slice.stop]
                    strain_chunk.prepend_zeros(-seg_slice.start)
                    freq_seg = make_frequency_series(strain_chunk)
                elif seg_slice.stop > len(self.strain):
                    strain_chunk = self.strain[seg_slice.start:]
                    strain_chunk.append_zeros(seg_slice.stop - len(self.strain))
                    freq_seg = make_frequency_series(strain_chunk)
                freq_seg.analyze = ana
                freq_seg.cumulative_index = seg_slice.start + ana.start
                freq_seg.seg_slice = seg_slice
                self._fourier_segments.append(freq_seg)

        return self._fourier_segments
Return a list of the FFT'd segments.
        Return the list of FrequencySeries. Additional properties are
        added that describe the strain segment. The property 'analyze'
        is a slice corresponding to the portion of the time domain equivelant
        of the segment to analyze for triggers. The value 'cumulative_index'
        indexes from the beginning of the original strain series.