PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-12:12:50
G01     105.6          26.2                4.9 +/-    0.60       9.3 +/-    0.60  0.030 / 0.030
G07     109.1          57.0                3.9 +/-    0.62       4.6 +/-    0.62  0.020 / 0.030
G08     41.6           17.3                3.0 +/-    0.72       7.1 +/-    0.72  0.130 / 0.280
G11     85.3           42.3                5.2 +/-    0.41       7.3 +/-    0.41  0.080 / 0.150
G13     308.3          29.8                2.4 +/-    2.44       4.2 +/-    2.44  0.070 / 0.130
G17     205.9          40.7                4.6 +/-    1.58       6.6 +/-    1.58  0.070 / 0.170
G18     78.1           24.2                4.1 +/-    0.60       8.1 +/-    0.60  0.090 / 0.190
G19     210.0          11.2               -4.1 +/-    3.03     -11.3 +/-    3.03  0.060 / 0.190
G28     320.2          61.1                2.7 +/-    0.31       3.0 +/-    0.31  0.060 / 0.170
G30     21.2           78.5                3.9 +/-    0.53       4.0 +/-    0.53  0.030 / 0.040