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← ScienceWhich effect compromises Lidar accuracy during heavy rainfall?
A)Signal decoherence reduces usable reflectivity✓
B)Increased absorption raises noise floor
C)Atmospheric lensing distorts return pulses
D)Raindrop refraction changes pulse duration
💡 Explanation
Signal decoherence degrades Lidar ranging because it is fundamentally an interference-based measurement; range precision depends on light source phase relations. Therefore, reduced laser coherence impairs precise distance calculations, rather than direct absorption alone.
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