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{ "schema": "ringgrid.target.v4", "name": "ringgrid_example_hex_200mm", "pitch_mm": 8.0, "rows": 15, "long_row_cols": 14, "marker_outer_radius_mm": 4.8, "marker_inner_radius_mm": 3.2, "marker_ring_width_mm": 1.152 }