pushing the green thread 

a colloquialism used in phased array ultrasonic testing describing the act of maximizing the signal amplitude over a range of angles during calibration

Yo, did you push the green thread? Your sensitivity is whack at 60°
Took me forever to push the green thread on this notch. Sigh.
What’s the point of pushing the green thread for an ‘S’?

pushing the green thread by mm_are_better May 22, 2024