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Application of the full spectrum inversion algorithm to simulated airborne GPS radio occultation signals

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Figure

Figure 1. Schematic plot of airborne radio occultation geometry.Projection of the receiver from its original position P with ra-dius Rrec onto a new position P0 on a circular trajectory with ra-dius Rrec,0 relative to local center of curvature O
Figure 2. End-to-end simulation system for airborne RO data pro-cessing. (Note: derivation of bending from refractivity in forwardAbel does not need the occultation geometry information but onlythe receiver height and refractivity at the receiver.)
Figure 3. (a) ERA-I temperature and water vapor mixing ratio at 18:00 UTC on 13 September 2010 at 16.5◦ N, 76.5◦ W; (b) simulatedexcess phase and derived Doppler velocity (inset shows the Doppler velocity after 1500 s); (c) simulated signal amplitude; (d)
Figure 4. (a) The amplitude of the received signal simulated byNote that the residual phases with and without the amplitude noiseare close to each other and appear to be on top of each other in thefigure.the ray-tracing model (blue) and the noise-added ampl
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