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← ScienceWhich outcome results when coherence length vastly exceeds imaging distance using synthetic aperture radar (SAR)?
A)Speckle noise increases significantly
B)Image resolution becomes diffraction-limited
C)Phase unwrapping becomes more reliable✓
D)Signal-to-noise ratio worsens gradually
💡 Explanation
Reliable phase unwrapping emerges because high coherence enables accurate phase difference measurements between adjacent pixels facilitated by constructive interference, therefore robust phase information reconstruction occurs, rather than being hampered by noise as in incoherent signals.
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