Changes between Version 54 and Version 55 of OMI_observation_modules
 Timestamp:
 Sep 20, 2024, 7:11:37 PM (2 weeks ago)
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OMI_observation_modules
v54 v55 313 313 === `ivar_obs_p` === 314 314 315 The default mode of PDAFOMI uses a diagonal observation error covariance matrix **R**. The observation error variances can vary. `ivar_obs_p` is used to specify the inverse observation error variances.315 The default mode of PDAFOMI uses a **diagonal observation error covariance matrix R**. The observation error variances can vary. `ivar_obs_p` is used to specify the inverse observation error variances. 316 316 This should be a vector of real values. It will be used as an argument to `PDAFomi_gather_obs`. The order of the entries has to be consistent in the arrays `thisobs%id_obs_p`, `obs_p`, `ivar_obs_p`, and `ocoord_p`. 317 318 If **nondiagonal observation error covariance matrices** are used, which is supported from PDAF 2.3, `ivar_obs_p` still has to be allocated and initialized. However, since the handling of **R** is ddone in a callback routine if **R** is nondiagonal, it is up to the user whether this information is used. For more information see the **[wiki:OMI_nondiagonal_observation_error_covariance_matrices page on using nondiagonal Rmatrices with OMI]**. 317 319 318 320