Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
Southeast MarylandM-Dz365.7 m (barometer)1.60 km2,253 km
Ft. Belvoir ARMSM-Dz152.4 m above ground1.60 km14,039 km
DahlgrenM-Dz152.4 m above ground0.80 km3,379 km
WashingtonM/R-D121.9 m 4.80 km3,823 km