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Fig. 2

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Thirteen selected chords (blue), where GPS data are presented in solid lines and NTP by dashed lines. Gray segments show the other positive chords not used in limb-fitting. The black ellipse shows the best elliptical limb, and the gray region the solutions within 3σ. The orange segments represent each image acquired from the Montsec station and the light green segments show other negative chords.

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