Changes between Version 47 and Version 48 of OMI_observation_modules

Timestamp:

Apr 29, 2024, 12:48:09 PM (3 weeks ago)

Author:

lnerger

Comment:

--

OMI_observation_modules

@@ -162 +162 @@
    - `cradius`: The localization radius or directional radii (cut-off radius for the observations, weight is always =0 for distances > cradius)
    - `sradius`: The support radius (or directional redii) of the localization weight function
+Note, that starting with PDAF V2.2.1 these three variables can be either scalar values - for isotropic localization-, or arrays - for non-isotropic localization and for additionally choose separate weights functions for the horizontal and vertical directions (see the notes below for more information)
 
 The setting of `locweight` influences the weight function for the localization. The choices are standardized as follows
@@ -175 +176 @@
 **Notes:**
 - **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. 
-- **non-isotropic 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 non-isotropic localization according to the values specified in `cradius` and `sradius`.
+- **non-isotropic localization**: Nonisotropic localization was introduced with PDAF V2.2: `cradius` and `sradius` can be declared as vectors of length `thisobs%ncoords` and each element can get a different value. In this case, the values define a non-isotropic localization according to the values specified in `cradius` and `sradius`. PDAF-OMI will use these values to compute a directional localization radius.
+- **2D+1D factorized non-isotropic localization**: With PDAF V2.2.1 a factorized 2D+1D localization can be specified (see [wiki:OMI_observation_modules#thisobsdisttype explanation of disttype]. If the non-isotropic localization is used one can specify different weight functions for the vertical and horizontal directions. This is achieved by declaring `loweight` as a vector of size 2. Now the first element specifies the weight function (according to the table above) for the horizontal direction and the second element specified the wieght function for the vertical direction. When 'locweight' is used as a scalar variable, it specified the weight function in the horizontal direction while the weight function in the vertical dircetion is a constant value of one.
 
 == `localize_covar_OBSTYPE` ==
@@ -195 +197 @@
    - `cradius`: The localization radius (cut-off radius for the observations, weight is always =0 for distances > cradius)
    - `sradius`: The support radius of the localization weight function
+Note, that starting with PDAF V2.2.1 these three variables can be either scalar values - for isotropic localization-, or arrays - for non-isotropic localization and for additionally choose separate weights functions for the horizontal and vertical directions (see the notes below for more information)
 
 **Notes:**
 - **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. 
 - **non-isotropic 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 non-isotropic localization according to the values specified in `cradius` and `sradius`.
+- **non-isotropic localization**: Nonisotropic localization was introduced with PDAF V2.2: `cradius` and `sradius` can be declared as vectors of length `thisobs%ncoords` and each element can get a different value. In this case, the values define a non-isotropic localization according to the values specified in `cradius` and `sradius`. PDAF-OMI will use these values to compute a directional localization radius.
+- **2D+1D factorized non-isotropic localization**: With PDAF V2.2.1 a factorized 2D+1D localization can be specified (see [wiki:OMI_observation_modules#thisobsdisttype explanation of disttype]. If the non-isotropic localization is used one can specify different weight functions for the vertical and horizontal directions. This is achieved by declaring `loweight` as a vector of size 2. Now the first element specifies the weight function (according to the table above) for the horizontal direction and the second element specified the wieght function for the vertical direction. When 'locweight' is used as a scalar variable, it specified the weight function in the horizontal direction while the weight function in the vertical dircetion is a constant value of one.