PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-13:57:40
G01     111.7          22.9               10.2 +/-    1.97      21.0 +/-    1.97  0.030 / 0.020
G07     98.6           61.8               10.2 +/-    0.95      11.4 +/-    0.95  0.030 / 0.020
G08     42.4           23.8                7.4 +/-    2.05      14.8 +/-    2.05  0.030 / 0.040
G09     174.7          16.6                9.8 +/-    2.31      23.4 +/-    2.31  0.030 / 0.040
G11     94.9           42.2                9.6 +/-    0.56      13.4 +/-    0.56  0.140 / 0.220
G13     313.0          25.6                6.3 +/-    1.33      12.2 +/-    1.33  0.210 / 0.220
G17     204.0          32.9               10.1 +/-    2.58      16.7 +/-    2.58  0.090 / 0.140
G18     85.3           23.3                8.4 +/-    1.57      17.0 +/-    1.57  0.110 / 0.120
G28     308.0          59.9                7.5 +/-    0.83       8.5 +/-    0.83  0.080 / 0.130
G30     2.3            74.6                8.6 +/-    0.64       8.9 +/-    0.64  0.080 / 0.160