Some spysat orbital constellation plots (KH-12 Keyhole, Lacrosse and IGS)

Plots of the orbit constellations of the American KH-12 Keyhole optical imaging satellites and Lacrosse (Onyx) synthetic aperture radar satellites, and the Japanese IGS optical and radar satellites.

(see here for details on how the plots were made and additional plots)

(click images to enlarge)

This plot shows how the IGS satellites keep an eye on North Korea:

(click image to enlarge)