Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
BaltimoreM/R-D121.92 m 4.83 km4,250 km
HarrisburgM/R-D121.92 m 4.83 km4,852 km
Pennsylvania Triassic '57M-Dz152.4 m above ground0.40 km18,958 km
Pennsylvania CoopM-Dz914.4 m (barometer)3.22 km4,828 km
Central & Northern Penn.M-Dz304.8 m above ground4.83 km12,714 km