Changes between Version 40 and Version 41 of OMI_observation_modules
 Timestamp:
 Mar 8, 2024, 10:58:27 AM (6 weeks ago)
Legend:
 Unmodified
 Added
 Removed
 Modified

OMI_observation_modules
v40 v41 155 155  Specify the localization variables (These variables are usually set in `init_pdaf` and included with `use mod_assimilation`) 156 156  `locweight`: Type of localization (see table below) 157  `cradius`: The localization radius (cutoff radius for the observations, weight is always =0 for distances > cradius)158  `sradius`: The support radius of the localization weight function157  `cradius`: The localization radius or directional radii (cutoff radius for the observations, weight is always =0 for distances > cradius) 158  `sradius`: The support radius (or directional redii) of the localization weight function 159 159 160 160 The setting of `locweight` influences the weight function for the localization. The choices are standardized as follows … … 168 168 Here, 'regulation' refers to the regulated localization introduced in Nerger, L., Janjić, T., Schröter, J., Hiller, W. (2012). A regulated localization scheme for ensemblebased Kalman filters. Quarterly Journal of the Royal Meteorological Society, 138, 802812. [https://doi.org/10.1002/qj.945 doi:10.1002/qj.945]. 169 169 170 Note: 171  The localization in OMI is isotropic. Thus, it uses the same `cradius` in all directions. If different localization scales should be applied e.g. in the vertical compared to the horizonal one needs to scale the vertical coordinates. 170 **Notes:** 171  **isotropic localization**: If `cradius` and `sradius` are scalar values, the localization is isotropic. Thus, it uses the same `cradius` in all directions. If different localization scales should be applied e.g. in the vertical compared to the horizonal one needs to scale the vertical coordinates. 172  **nonisotropic localization**: Nonisotropic localization was introduced with PDAF V2.2: `cradius` and `sradius` can declared as vectors of length `thisobs%ncoords` and each element can get a different value. In this case, the values defined a nonisotropic localization according to the values specified in `cradius` and `sradius`. 172 173 173 174 == `localize_covar_OBSTYPE` == … … 189 190  `cradius`: The localization radius (cutoff radius for the observations, weight is always =0 for distances > cradius) 190 191  `sradius`: The support radius of the localization weight function 192 193 **Notes:** 194  **isotropic localization**: If `cradius` and `sradius` are scalar values, the localization is isotropic. Thus, it uses the same `cradius` in all directions. If different localization scales should be applied e.g. in the vertical compared to the horizonal one needs to scale the vertical coordinates. 195  **nonisotropic localization**: Nonisotropic localization was introduced with PDAF V2.2: `cradius` and `sradius` can declared as vectors of length `thisobs%ncoords` and each element can get a different value. In this case, the values defined a nonisotropic localization according to the values specified in `cradius` and `sradius`. 196 191 197 192 198 == Additional routines for 3DVar ==