MPI_Bcast(&opt_filter, 1, MPI_INT, 0, mpi_ct.comm);
MPI_Bcast(&opt_filter_domain, 1, MPI_INT, 0, mpi_ct.comm);
MPI_Bcast(&opt_filter_param, 1, MPI_DOUBLE, 0, mpi_ct.comm);
MPI_Bcast(&opt_filter, 1, MPI_INT, 0, mpi_ct.comm);
MPI_Bcast(&opt_filter_domain, 1, MPI_INT, 0, mpi_ct.comm);
MPI_Bcast(&opt_filter_param, 1, MPI_DOUBLE, 0, mpi_ct.comm);