Airborne geophysical surveys

Survey name	Type	Altitude	Spacing	Flight line distance
Hot Springs	M/R-D	121.92 m	4.83 km	4,711 km
New Castle	M/R-D	121.92 m	4.83 km	4,764 km
S.W. S. Dakota-E. Wyoming	M-D	152.4 m above ground	1.00 km	10,581 km