PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/04-10:58:00
G01     106.2          25.9                4.0 +/-    1.30       7.7 +/-    1.30  0.020 / 0.030
G07     108.2          57.4                4.0 +/-    0.40       4.6 +/-    0.40  0.030 / 0.030
G08     41.5           17.1                1.9 +/-    0.54       4.5 +/-    0.54  0.030 / 0.040
G11     85.6           42.2                5.1 +/-    0.43       7.2 +/-    0.43  0.030 / 0.050
G13     308.8          29.5                1.9 +/-    2.47       3.3 +/-    2.47  0.070 / 0.140
G17     205.3          40.9                6.1 +/-    0.56       8.7 +/-    0.56  0.070 / 0.130
G18     78.6           24.1                4.2 +/-    0.99       8.4 +/-    0.99  0.060 / 0.170
G19     209.8          10.2               -4.8 +/-    5.80     -13.4 +/-    5.80  0.060 / 0.190
G28     318.7          61.0                2.2 +/-    0.87       2.5 +/-    0.87  0.070 / 0.170
G30     16.1           77.9                4.2 +/-    0.57       4.3 +/-    0.57  0.070 / 0.150