Unmanned aerial vehicle-based marine aeromagnetic daily variation station and geomagnetic measurement method

The invention discloses an unmanned aerial vehicle-based marine aeromagnetic daily variation station and a geomagnetic measurement method. The daily variation station comprises an unmanned aerial vehicle flight control system, a main control system and a ship-borne device arranged on a deck of a survey ship and a geomagnetic device arranged on the unmanned aerial vehicle, wherein the geomagnetic device comprises a crossbar, and a proton magnetometer, an airborne power converter and a data acquisition memory arranged on the crossbar according to a weight ratio; the unmanned aerial vehicle flight control system communicates mutually with the unmanned aerial vehicle; the unmanned aerial vehicle flight control system is used for controlling compensation flight, position adjustment and spot hover of the unmanned aerial vehicle; and the main control system communicates with the unmanned aerial vehicle flight control system, the ship-borne device and the geomagnetic device. A mode of adoptingthe proton magnetometer