Fig. 7
From: Research on the micromotion characteristics of a chaff cloud
Micro-Doppler frequency of single chaff dipoles with different ranges (in the radar coordinate system): a θ = 30∘, φ = 30∘, dr = 706 m, b θ = 30∘, φ = 30∘, dr = 709 m, and c θ = 30∘, φ = 30∘, dr = 716 m