ABSTRACT
The Soil Line (SL) can be calculated not only in the RED-NIR spectral space of a single Remote Sensing Data (RSD) frame, but also in the multi-temporal spectral space for each RSD pixel. This possibility is determined by the presence of a large number of the same type of RSD at each point on the Earth’s surface and the development of a mathematical apparatus for RSD normalization. The soil line constructed for the element of resolution of the RSD using multi-temporal data should be called a multi-temporal SL. MSL is characterized by a larger set of coefficients than the traditional LP since it is the semi-major axis of the ellipse of RED-NIR values corresponding to the open soil surface at the time-varying RSD. Any three parameters can give a three-dimensional distribution of the MSL coefficients, which can be approximated by an elastic rod, i.e. transformed into a one-dimensional space.
