GBRAR Measurement of Vibration Frequencies: Synergy with Micro-Doppler Analysis of Spaceborne SAR Images

In this work, the perspective synergy of Ground-Based Real Aperture Radar (GBRAR) measurements and micro-Doppler analysis of space-borne Synthetic Aperture Radar (SAR) images for the monitoring of vibration frequencies of large viaduct is discussed. A methodology for the processing GBRAR data and merging of ground-based and space-borne data is described. GBRAR data are interferometrically processed to provide time-range maps of Line-of-Sight (LoS) displacements. First results of GBRAR Ku-band measurements are presented. Vibration frequencies of different structural elements of the viaduct are derived. As a co-product, displacements of the bridge deck due to the crossing of vehicles are also obtained.