中文说明：
根据参数完成卫星双差模式下的相对位置定位解算，实现载波相位伪距下的静态高精度相对定位（卫星参数已给出）。
English Description：
According to the parameters, the relative position of satellite in double difference mode is calculated, and the static high-precision relative positioning under carrier phase pseudo range is realized (the satellite parameters have been given)