Abstract: From the shadow of the radar in the standard atmosphere, the paper studies the characteristics and distributing features of the atmospheric duct. Using the simulating test, we analyze the shadow of the radar in the atmospheric duct with different electromagnetic parameters of the radar, atmospheric duct parameters and terrain factor parameters. The study will offer the credible gist for using the radar, and establish the academic groundwork for the applied research of the shadown of the radar.

Key words: atmospheric duct, shadow zone of radar, radar hole, skip zone