PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-22:42:40
G02     224.0          68.1               12.5 +/-    0.85      13.4 +/-    0.85  0.040 / 0.050
G06     45.5           66.6               11.4 +/-    0.74      12.3 +/-    0.74  0.040 / 0.050
G12     320.8          43.8               10.3 +/-    0.42      14.1 +/-    0.42  0.080 / 0.090
G17     62.0           30.2                9.0 +/-    1.43      15.8 +/-    1.43  0.080 / 0.100
G19     46.3           45.6               11.2 +/-    0.53      14.9 +/-    0.53  0.030 / 0.030
G24     255.2          39.2               14.7 +/-    1.36      21.7 +/-    1.36  0.030 / 0.030