PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/03-10:58:00
G01     108.1          24.9                3.5 +/-    2.06       6.9 +/-    2.06  0.020 / 0.020
G07     105.3          58.8                5.1 +/-    1.00       5.9 +/-    1.00  0.020 / 0.020
G08     41.6           18.7                2.4 +/-    1.86       5.4 +/-    1.86  0.080 / 0.120
G09     173.2          12.1                3.0 +/-    3.56       8.0 +/-    3.56  0.090 / 0.170
G11     88.3           42.2                5.2 +/-    0.75       7.3 +/-    0.75  0.080 / 0.150
G13     310.2          28.3                0.8 +/-    1.81       1.5 +/-    1.81  0.090 / 0.120
G17     204.5          38.9                5.9 +/-    1.20       8.7 +/-    1.20  0.100 / 0.140
G18     80.7           23.9                1.4 +/-    1.36       2.7 +/-    1.36  0.080 / 0.110
G28     314.9          60.7                2.2 +/-    0.96       2.5 +/-    0.96  0.040 / 0.040
G30     9.1            76.7                4.2 +/-    0.45       4.3 +/-    0.45  0.030 / 0.040