msg!(
id: msg1301,
type_name: Msg1301T,
fields: [
(source_name_str, df_desc_str_w_len),
(target_name_str, df_desc_str_w_len),
(system_id, df_u8),
(utilized_trans_msg_ind, df_u10),
(ref_epoch_t0_mjd, df547),
(dx0_m, df548_49_50),
(dy0_m, df548_49_50),
(dz0_m, df548_49_50),
(r0_1_asec, df551_2_3),
(r0_2_asec, df551_2_3),
(r0_3_asec, df551_2_3),
(ds0_ppm, df554),
(dot_dx_m_yr, df555_6_7),
(dot_dy_m_yr, df555_6_7),
(dot_dz_m_yr, df555_6_7),
(dot_r_1_asec_yr, df558_59_60),
(dot_r_2_asec_yr, df558_59_60),
(dot_r_3_asec_yr, df558_59_60),
(dot_ds_ppm_yr, df561)
],
);