Disclosed herein are methods and devices for light emitting depth sensors such as scanning depth sensors and LIDARS. Methods, devices and systems disclose tracking a beam of reflected light pulses on an array of light sensing pixels. The tracking can dynamically update a location of the beam or an expected on-center time of the reflected light pulses at a pixel of the array. Counts of detected reflected pulses in time periods before and after the expected on-center time at a pixel are used to detect offsets in initial estimates of the beam location or timing.