Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
Mt. Hood '77M-D2134 m (barometer)1.60 km2,011 km
Mt. Hood '77 PeakM-D4267 m (barometer)1.60 km144 km
Mt. Hood '81M/EM-D50 m above ground0.20 km km
Northern Cascades WestM-D2134 m (barometer)1.60 km10,138 km
Northern Cascades EastM-D1524 m (barometer)1.60 km5,471 km
Mt. Hood '82M-D3353 m (barometer)1.60 km643 km
PascoM-D150 m above ground0.40 km51,790 km
The DallesM/R-D121.9 m 9.60 km2,336 km
S. Washington CascadesM-D2438 m (barometer)1.00 km6,960 km