Airborne geophysical surveys

Survey name Type Altitude Spacing Flight line distance
Grass Valley--Nevada CityM-Dz1067 m (barometer)0.80 km828 km
Grass Valley--AlleghanyM-Dz1676 m (barometer)0.80 km828 km
North Fork AmericanM-D304.8 m above ground1.10 km860 km
North Sierra FoothillsM-D304.8 m above ground0.80 km8,481 km
Martis CreekM-D150 m above ground0.20 km827 km
Martis Creek DetailM-D150 m above ground0.10 km101 km
ChicoM/R-D121.9 m 4.80 km4,869 km
Sacramento 2011M-D244 m above ground0.80 km km