Technical Note: Systematic Recalibration of the Resonant Hunter v8.4 Protocol and Identification of 180 Hz Power Line Harmonics in LIGO O4a Data.

This technical report provides a critical update on the detection protocols used in the search for the Unified Applicable Time (UAT) and Unified Causal Principle (UCP) signatures within the LIGO O4a archival data (specifically node GPS 1389416448). Through the implementation of the Sincere Validation Protocol v10.6, the researcher has identified that previously reported high-coherence peaks in the 180–195 Hz range were dominated by terrestrial interference, specifically: 180.12 Hz: Identified as a 3rd harmonic of the US power grid (60 Hz). 194.87 Hz: Classified as a stationary instrumental resonance. Key Findings: Stability Test Results: Time-shift analysis (±60 ms) resulted in a coherence ratio of ~1.00, confirming the stationary (non-transient) nature of these specific artifacts. Methodological Refinement: The transition from phase-rotation enhancement to Magnitude Squared Coherence (MSC) with notch-filtering is established as the new baseline for Percudani Authorship standards. Scientific Integrity: This note serves to recalibrate the Quantum Brake (k early ) and Inflationary Drift (α) constants by excluding identified noise floors, ensuring that future signal candidates meet the criteria for local-phase astrophysical events. File Content: 1. LaTeX source code for the technical note.2. PDF summary of the recalibration logic.