Sensors for structural health monitoring -- Ground-based radar (GBR) overview -- The working theory of GBR -- Signal processing of GBR data -- Deflection and modal analysis of GBR data -- Methodology in GBR field applications -- Case study: Application of GBR for non-rotary systems -- Case study: Application of GBR for onshore operating wind turbines -- The future of GBR -- Appendix A: GBR Matlab codes -- Appendix B: Answers to chapter specific questions -- Appendix C : OMA diagrams.