Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
AuroraM/R-D121.9 m 9.60 km2,666 km
Argonne Joliet ARMSM-Dz152.4 m above ground1.60 km19,312 km
Northwest IllinoisM-D548.6 m (barometer)4.80 km2,341 km