def METHOD_NAME(self):
    if self.parameter_filename.startswith("http"):
        sdf_class = HTTPSDFRead
    else:
        sdf_class = SDFRead
    self.sdf_container = sdf_class(self.parameter_filename, header=self.sdf_header)
    # Reference
    self.parameters = self.sdf_container.parameters
    self.dimensionality = 3
    self.refine_by = 2
    if self.domain_left_edge is None or self.domain_right_edge is None:
        R0 = self.parameters["R0"]
        if "offset_center" in self.parameters and self.parameters["offset_center"]:
            self.domain_left_edge = np.array([0, 0, 0], dtype=np.float64)
            self.domain_right_edge = np.array(
                [2.0 * self.parameters.get(f"R{ax}", R0) for ax in "xyz"],
                dtype=np.float64,
            )
        else:
            self.domain_left_edge = np.array(
                [-self.parameters.get(f"R{ax}", R0) for ax in "xyz"],
                dtype=np.float64,
            )
            self.domain_right_edge = np.array(
                [+self.parameters.get(f"R{ax}", R0) for ax in "xyz"],
                dtype=np.float64,
            )
        self.domain_left_edge *= self.parameters.get("a", 1.0)
        self.domain_right_edge *= self.parameters.get("a", 1.0)
    self.domain_dimensions = np.ones(3, "int32")
    if self.parameters.get("do_periodic", False):
        self._periodicity = (True, True, True)
    else:
        self._periodicity = (False, False, False)
    self.cosmological_simulation = 1
    self.current_redshift = self.parameters.get("redshift", 0.0)
    self.omega_lambda = self.parameters["Omega0_lambda"]
    self.omega_matter = self.parameters["Omega0_m"]
    if "Omega0_fld" in self.parameters:
        self.omega_lambda += self.parameters["Omega0_fld"]
    if "Omega0_r" in self.parameters:
        # not correct, but most codes can't handle Omega0_r
        self.omega_matter += self.parameters["Omega0_r"]
    self.hubble_constant = self.parameters["h_100"]
    self.current_time = units_2HOT_v2_time * self.parameters.get("tpos", 0.0)
    mylog.info("Calculating time to be %0.3e seconds", self.current_time)
    self.filename_template = self.parameter_filename
    self.file_count = 1