Dwarf satellites of the Milky Way, Andromeda, and other nearby hosts show striking phase-space correlations: thin co-rotating planes, kinematic pairs, and lopsided orientations toward companion galaxies (Kroupa 2005; Pawlowski 2018; Ibata 2013; Pawlowski 2021). These patterns are exceedingly rare in ΛCDM simulations where satellite subhalos populate random or transient configurations.
The standard model has satellites accreting stochastically over cosmic time, so phase-space configurations should be random or only briefly planar. The observed long-lived kinematically coherent satellite structures around multiple hosts has nowhere to go in the model except as statistical anomaly or as evidence for filamentary infall coincidence.
SCT replaces the hot-dense-center with a superluminal collision and the thermalized debris field. From this single change, the Milky Way satellite phase-space coherence is a shared-cascade-J inheritance signature, the same mechanism that produces the MW VPOS satellite plane (recid 130). MW satellites form together with their host as cascade-debris siblings of the same parent cascade event, all inheriting the same parent J = μ(b × v_rel) vector at deposition (P22, P25, P31, P32).
The phase-space correlations therefore exist by construction: positions are aligned in the cascade-deposited plane, velocities are aligned through shared inherited bulk J, and pair-kinematics reflect cascade-stage subhierarchies among the satellite population. Sibling pockets (P58, P59, P60) extend the coherence to the multi-Mpc scales where the broader Local Group satellite-system structure forms. Lopsidedness toward companion galaxies (e.g., M31 satellites lopsided toward MW) reflects the broader Local Group cascade-stream context where MW + M31 are themselves siblings in the parent cascade event.
Gravitational superposition (P50, P51, P52, P54) gives apparent satellite-system dynamical mass without invoking exotic CDM particle halos. The same M3 framework that produces the MW VPOS (recid 130), the M31 plane (recid 131), the Cen A streams (recid 134), and other satellite-plane phenomena accounts for the broader satellite phase-space structure as predicted cascade-inheritance rather than statistical anomaly.
If LSST + Roman + Euclid systematic survey of greater than 20 hosts finds satellite phase-space coherence statistically consistent with ΛCDM stochastic-accretion expectations at the 5% level (no shared-cascade-J inheritance signature), the M3 explanation is refuted. The signature SCT prediction is universal phase-space coherence around all sampled hosts with the cascade-J alignment.