Расчет гравитационных поправок с использованием данных воздушного лазерного сканирования

Abstract

Calculation of corrections to gravity measurements is one of the most important stages that determine the whole quality of research. Wrong corrections can lead to incorrect interpretation of the obtained measurements and lead to their false interpretation. To achieve highly accurate results, it is necessary to take into account not only the height, but also the entire array of information about the relief. In this case, level of detail of relief model becomes critically important, especially in case of working with rugged terrain with large number of vertically developed rock formations (outliers, rock faults, steep slopes). Now the methods normally used are based on the use of previously created materials from cartographic archives (topographic maps at a scale of 1:100,000–1:25,000). It is also possible to use open (free) terrain models. These materials have a number of drawbacks, for example, low detail of the microrelief and steep inclined surfaces (slopes, walls, faults, incisions) that have a significant effect on the values measured by gravimeters located at a small distance from such forms. The available methods do not assume ability to work with dense terrain models. These shortcomings lead to wrong corrections during gravimetric measurements. however, using of modern remote sensing methods makes possible to obtain a high-precision terrain models easily. The best opportunities are provided by lIDAR technology. here we describe differences between using lIDAR data and other types of data (1:25,000 maps, open data models), and make comparison between corrections, calculated using different data sources.