Extended data and code for "Missing modes and baseline adaptation: Quantifying loss of stiffness-change sensitivity in bridge monitoring"

Extended data tables, complete numerical result grids and analysis code accompanying the article "Missing modes and baseline adaptation: Quantifying loss of stiffness-change sensitivity in bridge monitoring" (Journal of Vibration and Control, manuscript JVC-26-1796). The record contains the detailed tables behind the summary tables of the journal supplement, the primary and revision analysis outputs for the KW51 railway bridge (measured modal data and a public finite element model) and the Hell Bridge Test Arena recordings, and the Python/Octave scripts that produced them. Source data are not redistributed; see README.md.