navigation message造句

According to the present status of studying the solar flare using gps , a new algorithm of processing gps data studying the solar flare is brought forward : after the instrumental bias has been determined , with the data of dual - frequency gps code and phase and navigation message , the vtec at the satellite ' s epp can be worked out
根据现在研究太阳耀斑的实际情况，提出了利用gps研究太阳耀斑的数据处理方法：利用双频观测值确定出仪器偏差后，再利用码和相位观测值，结合导航电文就可以求出电离层交叉点的沿天顶方向上的电子总量vtec值。
It's difficult to find navigation message in a sentence. 用navigation message造句挺难的