Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
Hot SpringsM/R-D121.92 m 4.83 km4,711 km
New CastleM/R-D121.92 m 4.83 km4,764 km
South Black HillsM-A152.4 m above ground0.40 km2,575 km
Black HillsM-A2286 m (barometer)1.61 km1,971 km
S.W. S. Dakota-E. WyomingM-D152.4 m above ground1.00 km10,581 km
S. South DakotaM-Dz1310.64 m (barometer)1.61 km28,690 km