PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-12:57:50
G01     117.9          18.8                4.3 +/-    4.00       9.7 +/-    4.00  0.030 / 0.040
G07     84.2           65.8                3.1 +/-    2.39       3.3 +/-    2.39  0.030 / 0.040
G08     44.1           29.2                2.4 +/-    2.10       4.2 +/-    2.10  0.130 / 0.270
G09     175.4          22.8                5.1 +/-    2.14      10.4 +/-    2.14  0.120 / 0.200
G11     103.8          40.4                3.8 +/-    3.00       5.5 +/-    3.00  0.040 / 0.060
G13     316.9          20.7                0.7 +/-    7.61       1.6 +/-    7.61  0.050 / 0.060
G17     201.8          26.5                5.4 +/-    2.62      10.2 +/-    2.62  0.040 / 0.090
G18     92.3           21.3                3.0 +/-    8.49       6.3 +/-    8.49  0.050 / 0.090
G28     295.0          57.8                2.2 +/-    3.06       2.6 +/-    3.06  0.020 / 0.050
G30     346.6          69.0               -0.4 +/-    9.69      -0.4 +/-    9.69  0.020 / 0.050