PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-20:12:50
G01     110.6          23.7               14.2 +/-    2.46      28.7 +/-    2.46  0.100 / 0.150
G07     100.4          61.3               13.7 +/-    0.70      15.4 +/-    0.70  0.100 / 0.160
G08     43.0           26.9                9.8 +/-    2.17      18.4 +/-    2.17  0.060 / 0.110
G09     176.0          17.4               15.0 +/-    1.08      35.1 +/-    1.08  0.150 / 0.140
G11     96.2           42.8               14.5 +/-    0.88      20.2 +/-    0.88  0.020 / 0.030
G13     312.5          26.0               12.3 +/-    1.85      23.5 +/-    1.85  0.020 / 0.030
G17     205.9          29.5               15.7 +/-    0.86      27.7 +/-    0.86  0.110 / 0.150
G18     84.8           23.7               11.7 +/-    1.62      23.6 +/-    1.62  0.110 / 0.160
G28     311.6          60.4               13.1 +/-    1.10      14.8 +/-    1.10  0.060 / 0.050
G30     17.4           76.6               14.3 +/-    0.86      14.6 +/-    0.86  0.040 / 0.040