def METHOD_NAME(self, value):
    """set the time stamp.
    this is overridden so we can pass on the values to the internal objects.
    """
    self._check_number_type(
        value, "update_time"
    )  # micropython doesn't support calling setter of parent property, do it manually
    self._update_time = value
    self._lat.METHOD_NAME = value
    self._lon.METHOD_NAME = value
    self._alt.METHOD_NAME = value