Air-ground integrated earth magnetic field combined observation method and system

An air-ground integrated geomagnetic field combined observation system comprising:

• a mobile earth station and a console,
• wherein the mobile earth station is used for validating local geomagnetic field model parameters using geomagnetic field data collected by the mobile earth station before an airborne geomagnetic field survey mission is executed by an aircraft hosting the console and a magnetic-free tail stinger including a plurality of magnetometers, wherein the console includes the magnetometers;
• wherein the console is used for getting a geomagnetic field recursive dynamic model along a flight path of the aircraft using geomagnetic field data collected by the console via at least one of the magnetometers over the flight path and the local geomagnetic field model parameters when the geomagnetic airborne field survey mission is executed;
• getting a measuring error model along the flight path using an attitude measuring error obtained when the aircraft flies as per a preset attitude;
• getting an estimation of the geomagnetic field data collected by the console via at least one of the magnetometers over the flight path in a geographic coordinate frame using the geomagnetic field recursive dynamic model and the measuring error model.