Ecological Systems and Devices Annotation << Back Proposals on the Location, Composition and Equipment of Control and Calibration Polygons in Landslide-Prone Areas (using the Example of o. Sakhalin) Matvetsov D.F., Rybalchenko S.V. To effectively solve applied problems related to landslide processes (inventory, cataloging, forecasting and mapping of landslide hazards), it is necessary to use remote sensing data. These data, which contain information about the geophysical parameters of the surface, require machine processing. Even taking into account the progress in remote sensing processing methods, subsatellite observations - measurements of the characteristics of test objects and test sites - are still critically important for assessing the reliability of both the source data and their processing products. Using the Sakhalin Island territory as an example, a methodology for selecting test sites for satellite observations has been developed and tested as part of a study of the dynamics of landslide processes using remote sensing data. In addition, the composition and methodology of collecting the geophysical parameters of the Earth's surface at the selected test sites are described in detail. The data obtained were compared with representative remote sensing materials from open sources (ALOSPALSAR 2 and Landsat 8, 9 images), which made it possible to verify fi eld observations and clarify the interpretation of satellite data. Proposals have been developed for the organization of the work of control and calibration polygons. The main results of field research have confirmed: the possibility of forming representative datasets on the subject-specific features of landslide sites; the reliability of recording the spectral characteristics of the surface in landslide areas; the effectiveness of the combined approach (field observations + remote sensing) for monitoring landslide processes. Keywords: landslide hazard, landslide process, decoding feature, test site, subsatellite observations, geophysical parameters. DOI: 10.25791/esip.11.2025.1557 Pp. 42-51.