PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-13:27:50
G01     117.3          19.2                9.6 +/-    1.42      21.7 +/-    1.42  0.030 / 0.020
G07     85.6           65.5                9.1 +/-    0.35      10.0 +/-    0.35  0.030 / 0.030
G08     43.9           29.0                8.6 +/-    1.74      15.3 +/-    1.74  0.030 / 0.030
G09     175.5          22.4                8.4 +/-    1.10      17.4 +/-    1.10  0.030 / 0.030
G11     103.2          40.7                9.3 +/-    0.83      13.4 +/-    0.83  0.180 / 0.250
G13     316.6          21.2                6.7 +/-    2.48      14.3 +/-    2.48  0.200 / 0.300
G17     202.1          26.8                6.2 +/-    1.21      11.7 +/-    1.21  0.150 / 0.190
G18     91.8           21.5                8.7 +/-    1.38      18.4 +/-    1.38  0.160 / 0.150
G28     296.2          58.0                6.3 +/-    1.25       7.3 +/-    1.25  0.130 / 0.210
G30     348.1          69.7                8.0 +/-    0.39       8.5 +/-    0.39  0.140 / 0.200