ABSTRACT
Magnetic and electromagnetic instrumentation can be used for airborne surveying, from fixed-or rotary-wing platforms. The instrument packages, termed birds, are suspended from or flown below the platforms. The surveys are typically flown along flight lines separated by fixed distances determined by the target parameters. Data are continuously recorded in digital format. Navigational control can be obtained via global positioning systems (GPS) and/or other systems such as minirangers and video cameras.
