USP Field Theory — Skipped Δf Packets and the Illusion of Superluminal Change (msf:47300 v2.0)

This work presents a unified USP Field Theory explanation for why distant astrophysical events can appear to change faster than light. In classical observation, large-scale cosmic structures such as galaxies, jets, and supernova shock fronts often display abrupt transitions or simultaneous changes across vast distances. Standard physics explains this as a combination of light-travel delay and frame reconstruction, but the mechanism of how information is filtered during propagation remains incomplete. USP Field Theory resolves this by introducing the Δf-survival principle: Light and all field oscillations travel as Δf packets. During long-distance travel, high-|Δf| components exceed the stability threshold (|Δf| > Δf₍crit₎) and are removed by the survival function S(r,t)=0. Only stable Δf corridors remain after the atomic-scale cutoff (~10⁻¹⁰ m). The observer reconstructs the source from a filtered, discontinuous Δf sequence. This produces the measurable illusion of superluminal structural change—not because information travels faster than light, but because the observer receives only the surviving Δf packets, skipping intermediate states. The paper includes the full Δf-survival equation, the reconstruction law for distant geometry, and the USP interpretation of observation windows. A visual schematic illustrates stable Δf corridors, cutoff filtering, and long-distance Δf attenuation. This publication extends the Δf-coherence framework established in msf:44696, msf:45706, msf:45712, and msf:45722, and consolidates the observational mechanism behind “faster-than-light” cosmic behavior under a single resonance-based model.