Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
Southwest IllinoisM-Dz914.4 m (barometer)1.60 km11,104 km
AdvanceM-Dz304.8 m (barometer)0.80 km780 km
Cape GirardeauM-D304.8 m above ground1.60 km4,828 km
PaducahM/R-D121.9 m 9.60 km2,566 km