def process(self, timeseries):
        """converts a timeseries stream into a different coordinate system

        Parameters
        ----------
        informat: string
            indicates the input coordinate system.

        Returns
        -------
        out_stream: obspy.core.Stream
            new stream object containing the converted coordinates.
        """
        self.check_stream(timeseries)
        out_stream = None

        if self.informat == 'geo':
            out_stream = StreamConverter.get_deltaf_from_geo(timeseries)
        elif self.informat == 'obs' or self.informat == 'obsd':
            out_stream = StreamConverter.get_deltaf_from_obs(timeseries)

        return out_stream
    def process(self, timeseries):
        """converts a timeseries stream into a different coordinate system

        Parameters
        ----------
        informat: string
            indicates the input coordinate system.

        Returns
        -------
        out_stream: obspy.core.Stream
            new stream object containing the converted coordinates.
        """
        self.check_stream(timeseries)
        out_stream = None

        if self.informat == 'geo':
            out_stream = StreamConverter.get_deltaf_from_geo(timeseries)
        elif self.informat == 'obs' or self.informat == 'obsd':
            out_stream = StreamConverter.get_deltaf_from_obs(timeseries)

        return out_stream