Ionospheric Scintillation Simulation on Equatorial GPS Signals for Dynamic Platforms

Abstract

This paper presents a physics-based, data-consistent, multifrequency GPS scintillation signal simulator for dynamic platforms in the equatorial region. This simulator is based on a two-dimensional twocomponent power-law phase screen model which is described by a compact set of parameters. The time scale factor is mainly investigated in this paper, which determines the decorrelation time of the simulation signal and is affected by various factors including propagation geometry, irregularity drift velocity, and dynamics of the platform. The comparison between the initialization and simulation data for stationary receivers shows the effectiveness of the simulator. In addition, this paper examines the influence of the platform dynamics on simulation signals with respect to the geomagnetic field direction and the irregularity drift velocity. The simulator presented in this paper will provide a viable tool for dynamic GPS scintillation signal simulation and will aid the design for robust receiver processing algorithms during scintillation for dynamic platforms. #

A compact multi‐frequency GNSS scintillation model

“…A discussion of the relation of phase‐screen mode to multi‐frequency measurements and moving platforms can be found in Jiao et al, respectively. A discussion of the geometrical dependence can be found in Jiao et al…”

Survey on signal processing for GNSS under ionospheric scintillation: Detection, monitoring, and mitigation

“…Cornell Scintillation Model (CSM) (Humphreys, Psiaki, Hinks, O'Hanlon, & Kintner, 2009, 2010), based on a statistical model and the proper shaping of the spectrum of the entire complex scintillation signal. A Matlab toolbox is available at https://gps.ece.cornell.edu/tools.php. Recently, a new scintillation simulation method has been presented in Jiao, Xu, Rino, Morton, and Carrano (2018); Jiao, Rino, and Morton (2018); and Rino et al. (2018).…”

A two‐parameter multifrequency GPS signal simulator for strong equatorial ionospheric scintillation: modeling and parameter characterization

“…All the geometric and dynamic dependencies are encapsulated in the calculation of the scaling factor ρ F / v eff in the compact TPPSM . The quantities involved in this calculation include the angle between the signal propagation direction and the geomagnetic field vector, the satellite scan velocity and receiver scan velocity at the phase screen, and the drift velocity of the ionospheric irregularities ( v drift ) .…”

“…All the geometric and dynamic dependencies are encapsulated in the calculation of the scaling factor ρ F /v eff in the compact TPPSM. 31 The quantities involved in this calculation include the angle between the signal propagation direction and the geomagnetic field vector, the satellite scan velocity and receiver scan velocity at the phase screen, and the drift velocity of the ionospheric irregularities (v drift ). 33 Among these quantities, the only unknown is v drift , while the others can be calculated with the user-input propagation geometric parameters (satellite orbit and receiver PV) and existing models (such as the IGRF model).…”

“…No explicit specification of the propagation geometry is needed since the geometry is already embedded in the extracted value of ρ F / v eff . This model also enabled the study of scintillation effects on GNSS signals observed on dynamic platforms such as aircraft and low‐Earth‐orbit (LEO) satellites as presented in Jiao et al and Xu et al, respectively. In both references, { U , p 1 , p 2 , μ 0 } were extracted from real scintillation data segments using the IPE to specify the ionospheric structure realization, while ρ F / v eff was calculated for various user platform dynamics to investigate the platform dynamics' impact on scintillation signal propagation.…”