Yes, you can mow under your Tracker. Your working space under the Tracker will depend on the time of day and day of year. That’s because the panels are tilted to face directly at the sun, and as the sun travels the tilt of the panels changes. As a result, the amount of space underneath the lowest edge of the panels changes.
When the Tracker is in the vertical position before sunrise and after sunset, the bottom edge of the panels is approximately 4 ft above the ground. You could easily mow under that with a push mower, but you’d risk collision if you were using a riding mower.
Of course, most mowing occurs during the day. On the Spring and Autumn equinoxes (on or about March and September 20th), the Tracker is tilted enough that the clearance beneath the panels is 5 ft or more from about 10:15 am through 3:45 pm. By Summer Solstice, you’ve got 5 ft or more of clearance from about 8:30 am through 5:15 pm.