Bi-mimics of Different Polarizations in Order for GNSS-R Polarimetry

摘要

Global Navigation Satellite System-Reflectometry (GNSS-R) is a new promising remote sensing technique, due to its small volume, light weight, low cost and possibly high time and spatial resolutions. In principle, GNSS-R is a kind of bistatic radar. Bi-MIMICS (Bistatic MIMICS) model is a bistatic forest scattering model which is developed from the backscattering model MIMICS (Michigan Microwave Canopy Scattering). The first-order full polarimetric transformation matrix relates the incident intensity and the scattering intensity. Using the different kinds of modified stokes vector, bistatic scattering coefficients of any transmit and receive polarizations can be achieved. Numerical simulations of linear polarization, circular polarization and 45°linear polarization are given. Finally, simulations are carried out when the transmitted signal is RHCH and the received signals polarizations are RHCP, LHCP, H and V. Bi-mimics of different polarizations will be a vegetation scattering model for the GNSS-R polarimetry study.