Which statement best describes S-Band horizon compared to X-Band?

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Multiple Choice

Which statement best describes S-Band horizon compared to X-Band?

Explanation:
The key idea is how radio horizon depends on frequency through diffraction. Lower-frequency waves (like S‑band) have longer wavelengths, so they diffract more around the Earth’s curvature than higher-frequency waves (like X‑band). That extra bending lets the radar signal reach a bit farther beyond the geometric line of sight, making the practical horizon slightly longer for S‑band than for X‑band. The difference is small and also depends on antenna height and atmospheric refraction, but the overall trend is that S‑band has a slightly longer horizon.

The key idea is how radio horizon depends on frequency through diffraction. Lower-frequency waves (like S‑band) have longer wavelengths, so they diffract more around the Earth’s curvature than higher-frequency waves (like X‑band). That extra bending lets the radar signal reach a bit farther beyond the geometric line of sight, making the practical horizon slightly longer for S‑band than for X‑band. The difference is small and also depends on antenna height and atmospheric refraction, but the overall trend is that S‑band has a slightly longer horizon.

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