# Convergence and trend of Kalman Gain

I have implemented Kalman Filter for state estimation of AR(2) univariate model and wanted to plot the Kalman Gain. When implementing, I saw that Kalman gain for every sample is getting computed and is a matrix of dimension 2 rows by 1 column. After few samples, the Kalman Gain does not change and the value is

0.994795724921926;
3.43461876942314e-05


What does this imply? Can convergence be inferred from the plot of Kalman Gain values so computed? If so, then which value should I take out of the 2 rows?

UPDATE:

The following graph shows the plot of KAlman GAin computed for a uni-dimensional non - linear dynamical system and EKF when doing state estimation.