Some Initial Conditions for Disposed Satellites of the Systems GPS and Galileo Constellations

Figure 5

Time evolution of the osculating eccentricity (top) and the osculating critical angle (bottom) for a disposal GPS satellite. Note that the minimum of the eccentricity occurs when 2𝜔+Ω is crossing zero in decreasing direction (from positive to negative value) while maximum occurs when 2𝜔+Ω is crossing zero, but in increasing direction (from negative to positive value). Initial conditions: a = 3.5 R_T (22,324 km), e = 0.005, I = 56.06°, and other elements equal to zero; I_L = 28.58°.