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System calibration

With this new metric in hand, I went out into the field and conducted 23 studies at Soofa Sign locations in the Boston area, comparing real-world time-stamped data of when people entered a given Sign’s viewable impression zone to the data collected by the Sign’s Wi-Fi sensor.

By stripping away some filtering on the data previously in place, I was able to see collected data that more closely matched the real-world system and created a new method for calibrating Soofa Sign sensors that avoided issues of randomization in device identifications.