Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
BellevilleM/R-D121.9 m 9.60 km2,761 km
Southwest IllinoisM-Dz914.4 m (barometer)1.60 km11,104 km
PaducahM/R-D121.9 m 9.60 km2,566 km