PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/29-17:27:50
G01     111.2          23.3               18.4 +/-    1.48      37.3 +/-    1.48  0.160 / 0.130
G07     99.4           61.7               18.7 +/-    0.99      20.9 +/-    0.99  0.190 / 0.160
G08     42.8           25.5               14.5 +/-    2.68      28.0 +/-    2.68  0.040 / 0.040
G09     175.5          17.3               17.7 +/-    2.12      41.5 +/-    2.12  0.030 / 0.040
G11     95.7           42.5               19.1 +/-    0.86      26.7 +/-    0.86  0.020 / 0.020
G13     312.7          25.8               17.8 +/-    2.12      34.1 +/-    2.12  0.030 / 0.030
G17     205.0          31.2               18.1 +/-    1.30      30.9 +/-    1.30  0.090 / 0.150
G18     85.2           23.6               17.7 +/-    1.04      35.8 +/-    1.04  0.080 / 0.170
G28     309.8          60.2               17.4 +/-    1.09      19.8 +/-    1.09  0.100 / 0.180
G30     9.4            75.7               18.9 +/-    0.61      19.4 +/-    0.61  0.080 / 0.130