PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/27-13:58:00
G01     96.2           30.2                9.6 +/-    0.91      16.8 +/-    0.91  0.030 / 0.030
G07     120.3          50.0                9.2 +/-    0.35      11.5 +/-    0.35  0.030 / 0.030
G08     41.9           10.9                9.4 +/-    1.51      25.7 +/-    1.51  0.060 / 0.130
G11     74.1           41.1               10.0 +/-    0.71      14.2 +/-    0.71  0.070 / 0.120
G13     300.1          34.3                8.7 +/-    1.26      14.0 +/-    1.26  0.050 / 0.070
G17     210.8          48.7               11.8 +/-    2.09      15.1 +/-    2.09  0.050 / 0.100
G18     68.8           24.4                8.9 +/-    0.50      17.6 +/-    0.50  0.040 / 0.060
G19     212.7          19.5                6.7 +/-    1.91      15.0 +/-    1.91  0.040 / 0.050
G28     338.3          61.9                7.5 +/-    0.48       8.4 +/-    0.48  0.030 / 0.050
G30     76.2           79.8                9.1 +/-    0.91       9.2 +/-    0.91  0.030 / 0.050