Airborne geophysical surveys

Survey name	Type	Altitude	Spacing	Flight line distance
Pennsylvania Coop	M-Dz	914.4 m (barometer)	3.22 km	4,828 km
Central & Northern Penn.	M-Dz	304.8 m above ground	4.83 km	12,714 km
Scranton	M/R-D	121.92 m	4.83 km	4,345 km