Differential satellite navigation system of ship-based unmanned aerial vehicle

The invention provides a differential satellite navigation system of a ship-based unmanned aerial vehicle, and belongs to the field of landing navigation of ship-based unmanned aerial vehicles. The system specifically comprises a GD30 differential satellite navigation system, and a positioning and orientation board card is provided with double antennas for orientation; the external inertial navigation device obtains attitude speed course information of the ship; the CPU carries out resolving fusion on the position of the ship and the course information of the double antennas, the relative position of the ship and the double antennas is calculated by introducing a dynamic-to-dynamic differential relative positioning technology, and finally, attitude information such as the relative position of the unmanned aerial vehicle and the ship, the course and the speed of the ship and the like is transmitted back to a radio station according to a protocol for remote output; meanwhile, the ship speed is introduced to ser