Using a multiantenna GPS receiver in the airborne gravimeter GT-2a for surveys in polar areas

Nowadays the importance of airborne gravity surveys in polar areas has urged the designers to modify hardware and algorithmic solutions for the airborne gravity instruments, because platform type gravimeters such as GT-2A in standard implementation cannot be used in latitudes over ±75°. The solution is the use of multiantenna GPS receiver as a sensor of trajectory and aiding angular data. The paper focuses on real-time data fusion and postprocessing using multiantenna GPS receiver.