PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-19:12:50
G01     116.8          19.6               12.9 +/-    0.76      28.7 +/-    0.76  0.050 / 0.090
G07     86.3           65.6               10.6 +/-    0.27      11.6 +/-    0.27  0.110 / 0.060
G08     44.9           32.2                8.0 +/-    1.18      13.4 +/-    1.18  0.130 / 0.170
G09     177.0          23.7               12.9 +/-    0.84      26.0 +/-    0.84  0.140 / 0.210
G11     105.1          41.0               11.3 +/-    0.71      16.2 +/-    0.71  0.090 / 0.210
G13     316.5          21.2                8.6 +/-    1.79      18.4 +/-    1.79  0.100 / 0.250
G17     203.6          23.6               12.7 +/-    1.70      25.7 +/-    1.70  0.030 / 0.030
G18     92.0           21.8               10.2 +/-    2.01      21.5 +/-    2.01  0.040 / 0.030
G28     298.3          58.5                9.7 +/-    0.83      11.1 +/-    0.83  0.030 / 0.030
G30     355.7          71.7                9.3 +/-    0.65       9.8 +/-    0.65  0.030 / 0.030