Real-time and high-precision gravity compensating method

The invention relates to a real-time and high-precision gravity compensating method. A scheme adopted by the invention is as follows: a high-precision gravity database is calculated and stored in advance, and real-time calculation of high-precision gravity is achieved online by a look-up table interpolation method. According to the scheme, gravity grid data of several different height layers is calculated and stored in advance, and during specific calculation, linear interpolation is performed at the same height layer first and then the data of different height layers is linearly interpolatedto obtain a gravity vector. The real-time and high-precision gravity compensating method can be applied to a high-precision inertial navigation system and a combined system thereof, and the real-timeand high-precision gravity compensating method is provided. By the real-time and high-precision gravity compensating method, the database can be flexibly tailored and customized according to a usage scenario, the hardware stor