Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
HarrisburgM/R-D121.9 m 4.80 km4,852 km
Pennsylvania CoopM-Dz914.4 m (barometer)3.20 km4,828 km
Central & Northern Penn.M-Dz304.8 m above ground4.80 km12,713 km