Forest dielectric characteristics for navigation satellites signals in L 1 range

Аnatoly Sorokin,Evgenii Ponomarev,Vladimir Podoprigora,G.M Tsibulsky,V.B Kashkin,L.G Sverdlik,M.V Noskov,E.A Lupyan,V.I Kharuk,A.K Sagatelian

doi:10.1051/e3sconf/20197501011

Abstract

A structural dielectric model of the forest is presented taking into account the wood Biomass distribution. The multi-scale structural formations of the individual trees and the stand as a whole as a hierarchical system of non-interacting components of the mixed dielectric are discussed. Layers of crowns and trunks are distinguished as anisotropic dielectric media with gradient boundaries. The possibility of using the orientation parameter of the order of branches in the crown layer to estimate the gradients of the effective permittivity of the inhomogeneous distribution and its spatial anisotropy is analyzed. A comparative analysis of the features of the effective dielectric permittivity of pine and birch forests is carried out. The possibilities of using a layered anisotropic dielectric forest model to describe the transformation of GPS and GLONASS signals in order to restore the biometric characteristics of the forest are considered.

Highlights

The development of methods for recovering physical characteristics of tree stands using GLONASS and GPS signals has prospects of creating an effective forest monitoring system by a universal user resource - global navigation satellite systems (GNSS) [1]
Available GNSS signals are presented as an effective tool for continuous local monitoring of forests which allows obtaining data about the physical characteristics and state of the tree stands cover with a sampling frequency of 1 Hz in the L-band operating frequency range
A five-level structural dielectric model of the forest has been proposed taking into account the gradients of the biomass distribution and the complex effective permittivity of the tree stand

Summary

Introduction

The development of methods for recovering physical characteristics of tree stands using GLONASS and GPS signals has prospects of creating an effective forest monitoring system by a universal user resource - global navigation satellite systems (GNSS) [1]. Available GNSS signals are presented as an effective tool for continuous local monitoring of forests which allows obtaining data about the physical characteristics and state of the tree stands cover with a sampling frequency of 1 Hz in the L-band operating frequency range. The hardware-software complex for recording changes in the characteristics of transmitted and scattered GNSS signals in the tree stands provides obtaining attenuation coefficients from localized areas of forests [2]. The presence of models of electromagnetic waves interaction of microwave range with a stand allows restoring quantitative values of taxation parameters and moisture content of forests from linear attenuation coefficients. A version of the development of a dielectric model of a stand adapted for the characteristics of GNSS signals of the L1-band is presented

Special features of the dielectric forest model for GNSS signals

Conclusion