The software may have been tweaked, NOT the frequencies.
This is way out of my wheelhouse, but here’s the best I can figure out:
It wasn’t just software tweaks.
The AN/APG-79 AESA radar was a major hardware upgrade over older systems. It uses advanced tech that allows the radar beam to move instantly without any moving parts. It can also switch modes and adjust how it scans the sky—like changing channels, zooming in, or fine-tuning its focus—all in real time. That lets it spot smaller or faster objects that older radars would’ve missed.
Bottom line: both hardware and software improvements contributed to the increase in UAP detections after 2014.