Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
Berwick '55M-Dz228.6 m above ground0.80 km1,287 km
Central New Hampshire '68M-Dz1524 m (barometer)0.80 km1,561 km
Central New HampshireM-Dz914.4 m (barometer)0.80 km5,132 km
PortlandM/R-D121.92 m 8.05 km990 km