Equipment tests and calibration have very different flight patterns.
What is depicted is a job of some sort.
The landing time of 19:07 is fairly late in the day for Photography, so it's likely a Lidar mission.
Where the lines are tightly spaced, and at lower altitude, would yield a denser grid pattern (For lidar, measured in ppsm, points per square meter)
It's common to see projects request a lower resolution survey over a broad area, for things like environmental assessment and ancillary infrastructure planning (drainage, roads), and a higher resolution survey over the specific AOI, such as stockpiles and pits for a mine or forestry site.
That's how I interpret this track, but I don't believe this is an AMX mission.
AMX Price at posting:
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(20min delay)