Map of “signed B_app,los” for the AR FOV extracted from the SP scan dated 01-02-07 (FOV index 5, see Table 2. The map is saturated at  +100 G (white) and  −100 G (black). The pores eliminated from the contrast analysis are contoured in orange (there is no pores in the negative polarity). The pixels having B_app,los in an interval of  ±200 G around the contrast peaks of each polarity are contoured in blue (positive polarity) and cyan (negative polarity).