What process involving faster entry velocity overrides the atmospheric background glow?

Metal emissions from the meteoroid become the primary light source

The speed of entry dictates the intensity of the resulting plasma and the violence of the ablation process, which is the removal of material from the meteoroid's surface. When a meteoroid impacts Earth head-on, its increased velocity generates far hotter plasma compared to objects moving slower in orbit. This increased violence leads to a far more effective vaporization and excitation of the metals contained within the space rock itself. Consequently, the light emitted from the meteoroid's specific chemistry dominates the visual spectrum, effectively overriding or masking the characteristic red light signature emitted by the ionized atmospheric gases like nitrogen and oxygen.