This change is from a requested user feature when there was a need for much longer baselines that would be normal for RTK uses.  In this case the need for for ionospheric modeling investigations.

The allowed baseline distance for an NTRIP Rover device connecting to a NEAR stream Base Station can now be increased from the prior limit of 300 km to 1000 km. In a similar way, the maximum span to average over can now be increased from 1000 km to be 3000 km.  This increase was requested by the deployment’s an odd use case.  As a general rule, baselines over ~60 km are rarely of any use in traditional RTK applications.

The new functionality is reached (in the NEAR stream setup dialog by clicking on one of the buttons market Km, the button text will change to “Km expanded”  and the larger values can then be entered.  This article explains the function in more depth.

These values are saved when the dialog is saved. If the Km expanded button is checked, and if the current values are larger than the Km setting will allow, they are reduced to the largest allowed value.

Most deployments will not have any reason to use this feature.