Changes between Version 34 and Version 35 of OMI_observation_modules

Timestamp:

Feb 22, 2023, 3:57:16 PM (14 months ago)

Author:

lnerger

Comment:

--

OMI_observation_modules

@@ -156 +156 @@
    - `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
- 
-
+
+The setting of `locweight` influences the weight function for the localization. The choices are standardized as follows
+
+||= '''locweight''' =||= '''0''' =||= '''1''' =||= '''2''' =||= '''3''' =||= '''4''' =||
+||= '''function''' =|| unit weight ||  exponential  ||||||||  5-th order polynomial  ||
+||= '''regulation''' =||  -  ||  -  ||  -  ||  regulation using[[BR]]mean variance  ||  regulation using variance[[BR]]of single observation point  ||
+||= '''cradius''' =||||||||||||  weight=0 if distance > cradius  ||
+||= '''sradius''' =||  no impact  ||  weight = exp(-d / sradius)  ||||||||  weight = 0 if d >= sradius[[BR]] else[[BR]] weight = f(sradius, distance)  ||
+
+Here, 'regulation' refers to the regulated localization introduced in Nerger, L., Janjić, T., Schröter, J., Hiller, W. (2012). A regulated localization scheme for ensemble-based Kalman filters. Quarterly Journal of the Royal Meteorological Society, 138, 802-812. ​[https://doi.org/10.1002/qj.945 doi:10.1002/qj.945].
 
 == `localize_covar_OBSTYPE` ==