Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
Grand RapidsM/R-D121.9 m 9.60 km3,310 km
Argonne Joliet ARMSM-Dz152.4 m above ground1.60 km19,312 km
RockfordM/R-D121.9 m 9.60 km2,616 km
SE WisconsinM-D304.8 m above ground0.80 km3,741 km