Abstract: In order to solve the technical problem of space-time registration of ship-borne multi-sensor land-water three-dimensional monitoring system and separate surveying and mapping of land-water topography in landslide monitoring, we propose to use the tight-coupled data post-processed by GNSS(Global Navigation Satellite System) and INS(Inertial Navigation System) integrated navigation system to match time and calculate space of land-water three-dimensional monitoring data in landslide monitoring. Accurate, efficient and safe acquisition of monitoring data of bank collapse is realized. Error analysis demonstrates that the positioning accuracy of GNSS and INS integrated navigation is better than 2 cm. Test data show that the median error of land survey points is better than 10 cm, and that of water survey points is better than 15 cm, which meets the requirement of bank collapse monitoring accuracy. The 3D integrative bank collapse monitoring system with tightly coupled GNSS and INS can be extensively applied to bank collapse monitoring in navigation segment and provides new technical programme as it can obtain precise, highly efficient, and safe monitoring data.

Key words: bank collapse monitoring, three-dimensional integration, GNSS/INS tight coupling, integrated navigation, spatio-temporal registration