URUANA DE MINAS — 2008 RAW-GRID CURVATURE CORROBORATION

Source: independent ANP 0032 regular magnetic grid (1.5 km).
This is gridded raw-field corroboration, not direct within-flight-line N-S profiling.

Raw Mag north-gradient in fixed longitude corridor around Uruana:
0–8 km N:  +0.841790 nT/km
8–16 km N: -1.632000 nT/km
16–24 km N:+2.217333 nT/km
24–32 km N:+3.113029 nT/km

Diurnal-corrected mag_var:
0–8 km N:  +0.810400 nT/km
8–16 km N: -1.678733 nT/km
16–24 km N:+2.135867 nT/km
24–32 km N:+2.771010 nT/km

Thus the independent 2008 grid contains a negative-gradient transition band at 8–16 km north followed by positive gradients farther north, and the same sign architecture is present before and after diurnal correction.

STATUS: CORROBORATIVE / EXPLORATORY.
Do not equate this gridded result with the direct 2011 same-line raw-profile proof.