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                6.1 +/-    1.26      11.7 +/-    1.26  0.020 / 0.020
G07     107.2          58.1                6.7 +/-    0.56       7.8 +/-    0.56  0.020 / 0.020
G08     41.7           19.2                5.2 +/-    2.20      11.7 +/-    2.20  0.040 / 0.030
G09     173.6          11.9                6.8 +/-    2.09      18.2 +/-    2.09  0.030 / 0.030
G11     87.6           42.5                5.6 +/-    0.82       7.8 +/-    0.82  0.080 / 0.160
G13     309.4          28.9                4.7 +/-    1.38       8.4 +/-    1.38  0.090 / 0.130
G17     205.7          38.5                6.7 +/-    1.09       9.9 +/-    1.09  0.080 / 0.110
G18     79.7           24.2                6.1 +/-    2.14      12.1 +/-    2.14  0.080 / 0.130
G28     317.8          61.0                3.6 +/-    0.87       4.1 +/-    0.87  0.080 / 0.120
G30     18.4           77.9                5.6 +/-    0.63       5.7 +/-    0.63  0.080 / 0.130