Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
BillingsM/R-D121.9 m 4.80 km4,581 km
CodyM/R-D121.9 m 4.80 km4,646 km
ForsythM/R-D121.9 m 9.60 km2,504 km
HardinM/R-D121.9 m 9.60 km2,537 km
South-central MontanaM-Dz3658 m (barometer)3.20 km1,834 km
Powder River BasinM-D121.9 m above ground9.60 km9,948 km
Powder River R&DM/R-D121.9 m above ground9.60 km2,446 km
SheridanM/R-D121.9 m 4.80 km4,665 km