Changes between Version 57 and Version 58 of OMI_observation_modules
- Timestamp:
- Nov 24, 2024, 4:46:57 PM (7 days ago)
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OMI_observation_modules
v57 v58 265 265 }}} 266 266 267 Starting with PDAF V2.3.1 one can also use 268 {{{ 269 IF (assim_OBSTYPE) CALL PDAFomi_set_doassim(thisobs, 1) 270 }}} 271 267 272 === `thisobs%ncoord` === 268 273 269 274 This variable specifies the dimension of the distance computations. Thus thisobs%ncoord=2 will lead to distance computations in 2 dimensions. 275 276 This variable can either be set directly in the code, or, starting with PDAF V2.3.1 by calling [wiki:PDAFomi_set_ncoord]. 270 277 271 278 … … 290 297 See `/models/lorenz96/` for an example using case 1 with periodicity in one dimension. 291 298 299 This variable can either be set directly in the code, or, starting with PDAF V2.3.1 by calling [wiki:PDAFomi_set_disttype]. 300 292 301 293 302 === `dim_obs_p` === … … 334 343 - The entries are the indices of four elements of the state vector 335 344 336 '''Note:''' This array is only used in the observation operators provided by PDAF-OMI. If you don't use these observation operators, you might not need this array. 337 345 '''Notes:''' 346 * This array is only used in the observation operators provided by PDAF-OMI. If you don't use these observation operators, you might not need this array. 347 348 ||Starting from PDAF V2.3.1 one can also call [wiki:PDAFomi_set_id_obs_p] to initialize thisobs%id_obs_p. One provides a user-specified array of indices. The routine then allocates thisobs%id_obs_p and fills it with the provided indices. This should be particularly usable when not using Fortran. || 338 349 339 350 === `thisobs%domainsize` === … … 347 358 Setting one dimension to 0 or a negative value indicates that there is no periodicity in this direction. 348 359 360 || '''Note:''' Starting from PDAF V2.3.1 one can also call [wiki:PDAFomi_set_domainsize] to initialize thisobs%domainsize. One provides a user-specified array of domain sizes. The routine then allocates thisobs%domainsize and fills it with the provided values. This should be particularly usable when not using Fortran. || 361 349 362 350 363 === `thisobs%icoeff_p` === … … 358 371 359 372 Please see the [wiki:OMI_observation_operators documentation of OMI observation operators] for information on how to initialize the array `thisobs%icoeff_p` using functions provided by PDAF-OMI. 373 374 ||Starting from PDAF V2.3.1 one can also call [wiki:PDAFomi_set_icoeff_p] to initialize thisobs%icoeff_p. One provides a user-specified array of interpolation coefficients. The routine then allocates thisobs%icoeff_p and fills it with the provided coefficients. This should be particularly usable when not using Fortran. || 360 375 361 376 … … 366 381 - 1: double-exponential (Laplace) errors 367 382 383 This variable can either be set directly in the code, or, starting with PDAF V2.3.1 by calling [wiki:PDAFomi_set_obs_err_type]. 384 368 385 369 386 === `thisobs%use_global_obs` === … … 371 388 In the domain-localized filters (LESTK, LETKF, LSEIK, LNETF) observations are assimilated that are located within the localization around some grid point. When a model uses parallelization with domain-decomposition some of these observations might belong to a different process-domain. In the default mode (`thisobs%use_global_obs`=1) PDAF-OMI gathers all globally available observations so that each process has access to all observations. It can be more efficient to limit the observations on a process-domain to those observations that are located inside the domain or within the localization radius around it. Then, in the local analyses less observations have to be checked for their distance. Setting `thisobs%use_global_obs=0` activates this feature. However, it needs additional preparations to make PDAF-OMI aware of the limiting coordinates of a process sub-domain. 372 389 390 This variable can either be set directly in the code, or, starting with PDAF V2.3.1 by calling [wiki:PDAFomi_set_use_global_obs]. 391 373 392 The use of this feature is described in the [wiki:OMI_use_global_obs documentation on using domain-limited observations]. 374 393 394 395 375 396 === `thisobs%inno_omit` === 376 397 377 398 Setting this variable to a value > 0.0 activates the functionality that observations are omitted (made irrelevant) from the analysis update if the difference of their value and the ensemble mean to too large. For more information see the [wiki:PDAFomi_additional_functionality#Omittingobservationsthatarepotentialoutliers page on additional OMI functionality]. 399 400 This variable can either be set directly in the code, or, starting with PDAF V2.3.1 by calling [wiki:PDAFomi_set_inno_omit]. 401