Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
GilletteM/R-D121.9 m 4.80 km4,723 km
Hot SpringsM/R-D121.9 m 4.80 km4,710 km
New CastleM/R-D121.9 m 4.80 km4,763 km
Rapid CityM/R-D121.9 m 4.80 km5,009 km
Lawrence CountyM-A152.4 m above ground0.80 km1,689 km
Black HillsM-A2286 m (barometer)1.60 km1,971 km
S.W. S. Dakota-E. WyomingM-D152.4 m above ground1.00 km10,581 km
S. South DakotaM-Dz1311 m (barometer)1.60 km28,689 km
NemoM/R-D121.9 m above ground0.40 km238 km