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
Sierra Nevada '80M-D304.8 m above ground0.80 km6,035 km
ChicoM/R-D121.9 m 4.80 km4,869 km