Airborne geophysical surveys

Survey name	Type	Altitude	Spacing	Flight line distance
Missouri '79	M-D	365.76 m (barometer)	0.80 km	1,674 km
South Missouri Ground Mag	M-Dz	ground m at ground level	1.61 km	km
Poplar Bluff	M/R-D	121.92 m	4.83 km	4,889 km