Snap2stamps

Hello and good time
In radar interferometry processing by psi method, how is phase correction achieved?
At this stage, my output plot shows the numbers -3.1 and 3.1, if I want to analyze this, how should I analyze it?
In radar interferometry processing by psi method, how is phase recovery achieved?
In phase recovery stage, my output plot shows -8.7 and 18.5, how should I analyze this?
Thank you