The relative motion of the satellites for the cases when θ = ±2e, θ = ±e and θ = 0 in the coordinate system that rotates with one of the satellites (= the central dot = satellite 1). Here the eccentricity of satellite 2 is e = 0.01, while the satellite 1 has eccentricity 0. The distances were converted to kilometres assuming that a = 7000 km.