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                6.1 +/-    1.74      13.8 +/-    1.74  0.030 / 0.020
G07     84.2           65.8                7.2 +/-    0.33       7.8 +/-    0.33  0.040 / 0.030
G08     44.1           29.2                5.3 +/-    1.60       9.5 +/-    1.60  0.030 / 0.030
G09     175.4          22.8                5.7 +/-    1.97      11.6 +/-    1.97  0.020 / 0.020
G11     103.8          40.4                5.3 +/-    0.72       7.6 +/-    0.72  0.120 / 0.160
G13     316.9          20.7                3.7 +/-    2.00       7.9 +/-    2.00  0.150 / 0.150
G17     201.8          26.5                4.7 +/-    1.26       8.9 +/-    1.26  0.140 / 0.350
G18     92.3           21.3                5.1 +/-    1.37      10.9 +/-    1.37  0.150 / 0.430
G28     295.0          57.8                5.0 +/-    1.10       5.8 +/-    1.10  0.120 / 0.170
G30     346.6          69.0                5.3 +/-    0.79       5.6 +/-    0.79  0.110 / 0.180