PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/29-13:27:50
G01     106.9          25.6                5.9 +/-    0.88      11.3 +/-    0.88  0.030 / 0.040
G07     107.2          58.1                8.1 +/-    0.87       9.4 +/-    0.87  0.020 / 0.030
G08     41.7           19.2                5.7 +/-    0.54      12.9 +/-    0.54  0.080 / 0.110
G09     173.6          11.9                4.7 +/-    3.09      12.6 +/-    3.09  0.070 / 0.130
G11     87.6           42.5                6.6 +/-    0.45       9.3 +/-    0.45  0.040 / 0.090
G13     309.4          28.9                5.5 +/-    1.80       9.8 +/-    1.80  0.040 / 0.090
G17     205.7          38.5                8.0 +/-    2.83      11.9 +/-    2.83  0.050 / 0.060
G18     79.7           24.2                5.8 +/-    0.65      11.6 +/-    0.65  0.050 / 0.060
G28     317.8          61.0                5.9 +/-    0.85       6.7 +/-    0.85  0.030 / 0.040
G30     18.4           77.9                7.4 +/-    0.72       7.6 +/-    0.72  0.030 / 0.040