Changes between Version 53 and Version 54 of OMI_observation_modules


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Timestamp:
Sep 20, 2024, 7:07:09 PM (18 hours ago)
Author:
lnerger
Comment:

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  • OMI_observation_modules

    v53 v54  
    110110 1. [wiki:OMI_observation_modules#obs_p obs_p]: Fill the vector of observations
    111111 1. [wiki:OMI_observation_modules#ocoord_p ocoord_p]: store the coordinates of the observations
    112  1. [wiki:OMI_observation_modules#ivar_obs_p ivar_obs_p]: store the inverse error variance of each observation
     112 1. [wiki:OMI_observation_modules#ivar_obs_p ivar_obs_p]: store the inverse error variance of each observation for the default mode of OMI, which assumes a diagonal observation error covariance matrix
    113113 1. [wiki:OMI_observation_modules#thisobsid_obs_p thisobs%id_obs_p]: store the indices of state vector elements that correspond to an observation (A single value for observation at grid points, or multiple values for derived quantities or interpolation)
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    313313=== `ivar_obs_p` ===
    314314
     315The default mode of PDAF-OMI 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.
    315316This 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`.
    316317