Article Figures & Data
Figures
- FIGURE 1
Illustration of the geometry of the phase screen model
- FIGURE 2
Illustration of the correspondence between S4 and U (left panel) and the bi-linear relationship between ρ/veff, S4, and τ (right panel)
- FIGURE 3
Block diagram depicting the steps involved when using the scintillation backpropagation algorithm to correct phase measurements
- FIGURE 4
Simulated scintillation amplitude (first panel) and phase (second panel) measurements corresponding to L1, L2, and L5 frequencies for a strong scintillation. The phase in the second panel has been scaled to TEC units. The third panel shows the simulated diffraction residuals obtained by subtracting the phase screen from the simulated phase measurements. The black dashed lines show the fit used to identify cycle slip occurrences.
- FIGURE 5
The occurrence rates of cycle slips
Shown here are findings obtained from simulated measurements before (solid lines) and after (dashed lines) applying backpropagation, as related to different signal C/N0 values. Different colored lines are used to indicate the different scintillation strengths as defined by S4.
- FIGURE 6
The occurrence rate of cycle slips
The findings shown here are similar to those shown in Figure 5 with simulated measurements before and after applying backpropagation under different levels of non-ionospheric Doppler.
- FIGURE 7
Signal C/N0 (top panel), detrended phase (second panel), the ρ/veff parameter (third panel), and the detrended phase after applying the backpropagation procedure (fourth panel) for GPS L1, L2, and L5 measurements during a scintillation event for a receiver near Hong Kong.
- FIGURE 8
The ionosphere-free (IF) and geometry-ionosphere-free (GIF) phase combinations before (red) and after (blue) applying backpropagation
Tables
- TABLE 1
Scintillation Phase Screen Parameters (for L1 Signal)
These parameters are used for the simulations shown in Section 2.
S4 τ U ρ / veff 0.5 0.8 0.55 1.21 0.65 0.8 0.92 1.33 0.80 0.8 1.47 1.49
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