Calculating Phase from SLC

So I’m calculating phase from the i and q components of an SLC image, where

phase =atan(q_IW1_VH / i_IW1_VH)

and the values I get look good except they range from -1.5708 to +1.5708. I’d expect them to range from -pi to pi radians, or maybe -180 to 180 degrees, but -1.5708 to +1.5708? What units are these? These values don’t seem right… Can anyone enlighten me on the proper way to calculate phase?

My SLC data has undergone a radiometric calibration, deburst, and terrain correction.

please try

Awesome! That’s it! From your prompt I found the following article illuminating: