GPS

说明：  《载波相位相对定位双差方程原理》验证 《载波相位相对定位单差方程原理》验证 《载波相位相对定位双差方程原理》验证 《载波相位相对定位双差方程原理》验证当基站离流动站很近，并假设流动站概略坐标等于基站坐标，那么双差方程中距离向量就为0(" Double difference carrier phase relative positioning equation theory" test " single-difference carrier phase relative positioning equation theory" test " double difference carrier phase relative positioning equation theory" test " double difference carrier phase relative positioning equation principle" is verified when the base station from the mobile station near, and assuming that mobile station is equal to the base station coordinates approximate coordinates, so double-differential equation from the vector is 0)