Site grading correction

Site grading correction is a corrective action for Terrain Undulation Yield Losses on tracker sites. On these sites, rolling ground changes row geometry, backtracking behavior and inter-row shading, and the losses can collect in specific motor blocks. The source lists correcting the grading or the tracker geometry where practical. It sits alongside three other steps: tuning backtracking for each terrain zone, checking motor block sizing assumptions, and updating energy models with measured row-level behavior. It applies when local grade changes make the built field differ from the simplified geometry assumed in backtracking and yield models. This shows up as uneven apparent row spacing, tracker angles that do not match, or too much local shading. Before regrading, confirm that the losses repeat with sun position, are worst at low sun angles, and cluster at grade breaks, swales, rolling sections or motor block boundaries. Drone imagery, row-end angle surveys, tracker command logs and normalized string or inverter output help show whether the losses follow grade breaks rather than equipment failure.

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• sentence 4: support check: partial - The passage describes the signature (repeatable by sun position, strongest at low sun angles, clustering at those locations), but does not say to confirm it before regrading. -->