We present a unified SIGINT detector that fuses
ATL/TWPA hardware priors with physics-correct, pumpreferenced idler proximity scoring (IPS). By separating 3WM and
4WM processes, applying selective stopband penalties, and autotuning weights via grid search, the method achieves +5.5% PRAUC and -38% FPR@95%TPR versus SNR-threshold baseline.
Real TWPA data confirms idler alignment within ±3 ppm.
Integration uses five ops-stack hooks; full code emits one-click
ROC/PR reports.