In this paper. GNSS interferometric reflectometry (GNSS-IR) is firstly proposed to estimate ground surface subsidence caused by underground coal mining. Ground subsidence on the main direction of a coal seam is described by using the probability integral model (PIM) with unknown parameters. Based on the laws of reflection in geometric optics. https://www.ngetikin.com/deal-time-Orange-Zinger-Tomato-Container-Cherry-Tomatoes-Lycopersicon-Esculentum-5-Seeds-mega-super/