Range Foldover and Earths Rotation

Range Foldover and Earth s Rotation 3.1 Range Foldover Phenomenon 

Range Resolution. Let r represent the output pulse length and Tr the pulse repetition interval. Pulses travel along the slant range and interact with the ground through the mainbeam as well as the sidelobes of the antenna array as shown in Fig. 13. 

Each pulse travels along the slant range and hence the slant range that can be recovered unambiguously is of size Thus, slant range resolution is given by 

Translating to the ground plane, since the pulse wavefront is perpendicular to the slant range direction, we get the range resolution on the ground to be 

Total Range Foldover. Radar transmits pulses every Tr seconds and for high PRF situations, following (24), the distance Ar between range ambiguities on the ground (distance between consecutive pulse 

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