2014
DOI: 10.3319/tao.2014.07.07.01(a)
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Ray Tracing Simulation in Nonspherically Symmetric Atmosphere for GPS Radio Occultation

Abstract: A three-dimensional ray tracing model with aiming algorithms for global positioning system (GPS) signal is proposed to make simulations conform to the realistic radio occultation (RO) signal propagation. The two aiming algorithms used in this study ensure the initial and end point ray trajectories are located in the prescribed region. In past studies, the ray tracing techniques applied to the RO signal simulation usually assumed a spherically symmetrical atmosphere for simplicity. The exact GPS and low earth o… Show more

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Cited by 4 publications
(1 citation statement)
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“…However, in the presence of horizontal gradients, the impact parameter can only be evaluated fromũ T,R , which are function of the relative Doppler frequency shift d, which is a function ofũ T,R . One of the possibilities would be to solve the boundary problem, i.e., iterative solve for a ray connecting two satellites [60]. This may be conjugated with difficulties in the presence of multipath propagation, where there are multiple solutions.…”
Section: The Physical Model Of Ro Observationsmentioning
confidence: 99%
“…However, in the presence of horizontal gradients, the impact parameter can only be evaluated fromũ T,R , which are function of the relative Doppler frequency shift d, which is a function ofũ T,R . One of the possibilities would be to solve the boundary problem, i.e., iterative solve for a ray connecting two satellites [60]. This may be conjugated with difficulties in the presence of multipath propagation, where there are multiple solutions.…”
Section: The Physical Model Of Ro Observationsmentioning
confidence: 99%