PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/23-06:27:50
G07     33.6           69.2                6.3 +/-    0.81       6.7 +/-    0.81  0.190 / 0.440
G08     55.4           43.0                5.4 +/-    0.93       7.4 +/-    0.93  0.160 / 0.210
G09     174.9          39.7                8.9 +/-    1.30      13.0 +/-    1.30  0.030 / 0.030
G11     124.1          31.2                7.4 +/-    1.19      12.6 +/-    1.19  0.030 / 0.040
G18     108.4          12.9                7.3 +/-    3.02      19.0 +/-    3.02  0.030 / 0.030
G23     161.2          16.2                5.8 +/-    1.55      13.9 +/-    1.55  0.030 / 0.030
G27     39.3           14.7                3.0 +/-    2.76       7.6 +/-    2.76  0.170 / 0.250
G28     264.0          47.5                8.0 +/-    3.36      10.4 +/-    3.36  0.160 / 0.370
G30     323.1          53.0                5.1 +/-    0.47       6.2 +/-    0.47  0.170 / 0.360