PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-12:58:00
G01     112.7          21.2                5.5 +/-    1.89      11.7 +/-    1.89  0.030 / 0.040
G07     98.1           59.7                6.5 +/-    0.82       7.4 +/-    0.82  0.040 / 0.030
G08     43.7           29.1                6.1 +/-    1.24      11.0 +/-    1.24  0.070 / 0.060
G09     176.5          21.2                6.0 +/-    1.83      12.8 +/-    1.83  0.060 / 0.070
G11     98.7           42.8                7.1 +/-    0.57       9.9 +/-    0.57  0.070 / 0.120
G13     314.0          25.0                4.2 +/-    1.32       8.2 +/-    1.32  0.080 / 0.120
G17     203.4          27.5                7.0 +/-    2.10      13.0 +/-    2.10  0.110 / 0.170
G28     293.7          55.9                4.9 +/-    1.52       5.7 +/-    1.52  0.110 / 0.220
G30     2.7            74.3                6.1 +/-    1.22       6.3 +/-    1.22  0.080 / 0.090