“Refractivity-from-clutter” based on local empirical refractivity model<xref rid="cpb_27_12_128401fn1" ref-type="fn">*</xref><fn id="cpb_27_12_128401fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 41775027 and 41405025).</p></fn>

“Refractivity-from-clutter” based on local empirical refractivity model**

Project supported by the National Natural Science Foundation of China (Grant Nos. 41775027 and 41405025).

Zhao Xiaofeng^†

(color online) Clutter returns as a function of range from 0 km to 150 km for different times. The red shaded area is the envelope of 13 returns in a 5°-interval, and the green line is the median.