Reflections from the ground surrounding the RWP (through antenna sidelobes)
From EG-CLIMET
Ground clutter echoes are observed due to the ubiquitous sidelobes of finite aperture antennas in comibination with the high receiver sensitivity, see e.g. Woodman/Guillen (1974), Sato/Woodman (1982), Martner et.al. (1993), May/Strauch (1998).
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